7 Best Bluetooth Audio Transmitters for TV [2021]

Avantree Oasis Plus
Avantree Oasis Plus

Check out this buyer guide on picking the best Bluetooth Transmitter for your TV.

NameAudio OutputAudio CodecBypass ModePrice
Avantree Oasis Plus Best Overall AUX, RCA, OpticalaptX, aptX LL, aptX HDY BUY
1Mii B03Pro+ Strong Runner-Up AUX, RCA, OpticalaptX HD, aptX LL, aptX and AACY BUY
Taotronic TT-BA014 Best Budget AUX, RCA, OpticalaptX, aptX LLY BUY
Avantree Orbit Best Premium Digital Optical / AUX / RCA / MicrophoneaptX-LL, aptX, FS, SBCY BUY
ELEGIANT BTI-066 Best for Calls AUX, RCA, Optical, USBaptX HD, aptX LL, SBC, and AACN BUY
Mpow BH390A Most Portable Aux, RCAaptX LL, aptX HD, aptX, and SBCN BUY
Avantree Audikast Plus Best for AirPodsAUX, RCA, Optical, USBaptX, aptX LLN BUY

Table of Content

What Is a Bluetooth Transmitter for TV?

A Bluetooth transmitter is a device that helps you transmit audio from one source to another Bluetooth device such as your wireless headphones. The receiving end will have a Bluetooth receiver in order to decode the receiving digital signal into audible audio.

Some Bluetooth transmitter can act as a receiver too. It can be connected with speakers and broadcast songs from your mobile phone or PC. You will see some of these dual-mode Bluetooth devices in our recommended list.

You might be interested: Best Wireless Headphones for TV

Why Will You Need a Bluetooth Transmitter for Your TV?

There are two main reasons why this is necessary:

  1. Your TV has no built-in Bluetooth transmitter
  2. Or your TV does have one but it doesn’t support low latency audio codec

The first reason is obvious to why an external Bluetooth transmitter is needed but it might not be so for the second reason.

Depending on the model and the year your TV was manufactured, the Bluetooth transmitter that was installed within the TV might have been outdated. There is newer technology that is able to reduce the latency or delay over the wireless connection.

Lip-sync Issue

This latency issue is also known as the lip-sync issue. This happens when the person on TV speaks and you only hear the audio a few seconds later. This mismatch causes a jarring listening experience.

More options than Bluetooth Transmitter

Bluetooth is a popular way to transmit audio wirelessly but you should also know that there are plenty of other ways to transmit audio wirelessly from your TV.

Common Names of a Bluetooth Transmitter

A Bluetooth audio transmitter is a rather formal name. They can also be colloquially known as:

  • Bluetooth dongle
  • Bluetooth audio adapter
Check if your headphone connects via Radio Frequency, Infra-red or Bluetooth. Each of them needs its own special type of transmitter.

How To Pick the Best Bluetooth Audio Transmitters for TV

Picking the right Bluetooth audio transmitter for your TV is tricky because not all the TV are the same. Some TV only supports only 3.5mm audio output and cannot transmit sound via other audio outputs. The distance between you and the TV matters too. You have to get a transmitter with the right Bluetooth version to cover the range. Else the sound signals will be distorted. 

Below is the list of factors that you should consider before buying a Bluetooth Audio Transmitter for your TV:

Audio Codec

Audio codec refers to the type of technology that encodes and decodes the audio. This affects the bandwidth and quality of your audio transmission and consequently affects the latency of transmission.

Audio codecs that you should look out for:

  • aptX
  • aptX Low Latency (aptX-LL)
  • aptX HD
The Bluetooth Transmitter should at least support aptX. If it doesn’t, the codec that they are properly be using is SBC – a common low-complexity codec that is of lower quality.

Audio Out

For your TV to connect to the Bluetooth transmitter, it requires a wired connection between the audio output of the TV to audio input of the Bluetooth transmitter.

Each TV has different types of audio output. Some offer both digital and analog audio output while some only offer either one of them. We should be careful that our Bluetooth transmitter caters to the correct type of audio connection or we might have to spend more money to purchase a converter for the connection to work.

Learn all about the different types of audio output at “Ultimate Guide to Audio Output

Below are the common audio out that Bluetooth Transmitter supports:

  • Digital Audio Output
    • Optical Audio (TOSLINK)
    • USB
  • Analog Audio Output
    • 3.5mm jack (AUX)
    • RCA (Colored in red and white)


Depending on the Bluetooth version (latest version is 5.2) and class, the effective range can be anywhere from 10m to 50m. Measure how far you will be sitting away from your Bluetooth Transmitter and consider the maximum effective range.

Audio Sharing

Most Bluetooth transmitter for TV supports this feature called “Dual Link” where it is fancy-speak for audio sharing for two-person. However, it is possible that the same audio codec will not be used for both single and dual-use.

For example, a Bluetooth transmitter can support aptX HD codec for a single connected device. But it reverts back to SBC when there is two connected devices.

Bypass Mode

If your TV audio is connected via Bluetooth, there will be no sound through your speakers that has a wired connection to your TV. However, there might be times you want to revert the audio transmission back to the wired speakers.

Some Bluetooth transmitter have a “bypass” mode which allows your audio connection to bypass the wireless connection and through to the wired speakers.

Display Interface

With so many options available to you, it is very useful for your Bluetooth transmitter to have a display interface that can reflect those options to you. Some transmitters only have light indicators to reflect the type of codec you are currently using while some have LED screens to reflect the different types of codecs, transmission mode, etc.

7 Best Bluetooth Transmitter For TV 2021

Avantree Oasis Plus

Best Overall
Avantree Oasis Plus
Avantree Oasis Plus

Key features:

  • Audio Output: RCA, AUX, Optical
  • Transmission Mode: TX/RX
  • Audio Codec: aptX, aptX LL, aptX HD
  • Dual Link: Support aptX LL
  • Range: 164ft / 50m
  • Has Bypass Mode
  • Simultaneous Support for Wired and Wireless
  • Has Display Interface

The Avantree Oasis Plus is our best overall pick as it is jam-packed with features for a reasonable price point. It has support for both analog audio output (RCA and AUX) and digital audio output (Toslink). With a toggle of a switch, it can act as both the transmitter and receiver.

In terms of audio codec, the Oasis Plus is one of the rare few Bluetooth transmitters on the list that offers up to aptX HD support. Even in Dual Link mode, it is able to maintain support for aptX Low Latency (aptX LL).

Equipped with a Class 1 Bluetooth transceiver, the Oasis Plus can reach 164’ or 50 m in range.

Other than usual Bypass Mode, the Oasis Plus actually caters to a unique use-case that no other Bluetooth transmitters in this list do. It can share TV audio with an external speaker and a pair of wireless headphones at the same time.

Lastly, to sum it up, the Oasis Plus comes with an elegant interface that displays the different mode and codec that your device is using.

However, the Oasis Plus is relatively the most expensive on this list.


1Mii B03Pro+

Strong Runner-up
Close look at 1Mii B03Pro+ (From: Amazon)
Close look at 1Mii B03Pro+ (From: Amazon)

Key features:

  • Audio Output: AUX, RCA, Optical
  • Transmission Mode: TX/RX
  • Audio Codec: aptX HD, aptX LL, aptX and AAC
  • Dual Link: Support aptX LL
  • Range: up to 265ft (80m) in an open-air area and up to 110ft (35m) indoors
  • Has Bypass Mode
  • Compatible with 99% of TVs and audio devices

With its amazing range and flexible connectivity, it shouldn’t be surprising for 1Mii B03Pro+ to be a solid runner-up on the list of the best Bluetooth audio transmitters for TV.

Like some top-of-the-line transmitters on this list, 1Mii B03Pro+ supports both optical and analog inputs and outputs, dual-link pairing, and Bypass mode. You can also use this both as a transmitter and a receiver. This means that you can play audio from your mobile device to your home stereo system with ease.

But one of the best features that bring this on top of the list, is its built-in ESS SABRE DAC. This is a digital to analog converter that most audiophiles swear to bring a gold-standard sound quality. That, together with the Qualcomm Bluetooth audio chip and the aptX Low Latency technology, you can expect nothing but true HI-Fi sound resolution and clarity, with little to no delays!

To fully enjoy its optimum sound quality, it’s always best to pair this with high-quality audio devices that also support the aptX LL codec.

With all these amazing features, you might be wondering why we didn’t put this as the best of the best Bluetooth audio transmitters.

One thing to note, though, is that despite being in the same price range as the top-ranking Avantree Oasis Plus, the 1Mii B03Pro+ lacks pass-through support. This feature allows users to listen simultaneously on the TV’s soundbar and their wireless headphones, which is undoubtedly a useful feature for specific circumstances.


Taotronic TT-BA014

Best Budget
TaoTronics TT-BA014
TaoTronics TT-BA014

Key features:

  • Audio Output: RCA, AUX, Optical
  • Transmission Mode: TX/RX
  • Audio Codec: aptX, aptX LL
  • Dual Link: Support SBC only
  • Range: 164ft / 50m
  • Has Bypass Mode
  • Rechargeable Battery: 20 hrs
  • Has Display Interface

If you compared the Taotronics TT-BA014 to the Oasis Plus, you almost get everything the latter has except for a aptX-LL Dual Link connection and the simultaneous wired and wireless connection. If you are looking for something considerably cheaper than the Oasis Plus and can afford to miss out on those features, the TT-BA014 is a perfect choice.

The TT-BA014 comes with a built-in rechargeable battery that the Oasis Plus doesn’t have. You can use it without bringing the charger along. The battery life is as follow:

  • TX+OPT: 20hr
  • TX+AUX: 25hr
  • RX+AUX: 18hr
  • RX+OPT: 15hr


Avantree Orbit

Best Premium
Close look at Avantree Orbit (From: Amazon)
Close look at Avantree Orbit (From: Amazon)

Key features:

  • Audio Output: Digital Optical / AUX/ RCA/ Microphone
  • Transmission Mode: TX/RX
  • Audio Codec: aptX LL, aptX, FS, SBC
  • Dual Link: Support aptX LL
  • Range: 164ft / 50m
  • Has Passthrough feature
  • Has Bypass Mode
  • Works with any TV
  • Compatible with Netflix, Hulu, and Amazon Prime

If you are looking for something premium and you don’t mind paying a little extra for some unique features, then the Avantree Orbit is worth checking out. This Bluetooth audio transmitter basically has all the features of Avantree Oasis Plus and more.

For an extra price, the Avantree Orbit is compatible with any TV model. That means it doesn’t matter if you have the oldest television ever, this can still transmit audio to your wireless audio device. How? Through the ingenious use of built-in microphones.

Avantree Orbit has a unique mic input, which picks up the sound from the TV’s speakers and streams it directly to your wireless audio devices.

This mic-input feature is also great for mounted TVs with hard-to-reach audio jacks.

Additionally, Avantree Orbit is made for those who love binge-watching their favorite series on their smart TVs. Unlike other transmitters that need you to manually set your audio to PCM to stream audio from different online platforms, this premium Bluetooth Audio transmitter won’t require you to do so. Simply plug/connect this to your TV and audio devices and you’re good to go!



Best for Calls
Close look at ELEGIANT BTI-066 (From: Amazon)
Close look at ELEGIANT BTI-066 (From: Amazon)

Key features:

  • Audio Output: AUX, RCA, Optical, USB
  • Transmission Mode: TX/RX
  • Audio Codec: aptX HD, aptX LL, SBC, and AAC
  • Dual Link: Support aptX HD/aptX LL
  • Range: 66 ft
  • Up to 24 hours of continuous playtime
  • Has Built-in mic

The ELEGIANT BTI-066 may be one of the most affordable transmitters on this list but that doesn’t mean it lags on quality and functionality.

This Bluetooth audio transmitter has a built-in 600 mAh battery which means that, with a single charge of about 2.5 hours, you can use this for up to 24 hours straight. It also allows simultaneous connection to two Bluetooth headphones or speakers, can act as a receiver, and supports aptX HD and LL so you won’t be bothered by audio delays.

Nonetheless, what separates the ELEGIANT BTI-066 from most other transmitters from the same price range or even higher is that it has a built-in microphone that can be used for hands-free calling. The switch from playing music to answering a call is also smooth.

This, however, only has a limited wireless range of only 66 ft, which is not impressive when you compare it with other transmitters on the list. It also lacks bypass mode, which is a feature that most users look for.


Mpow BH390A

Most Portable
Close look at Mpow BH390A (From: Amazon)
Close look at Mpow BH390A (From: Amazon)

Key features:

  • Audio Output: AUX and RCA
  • Transmission Mode: RX/TX
  • Audio Codec: aptX LL, aptX HD, aptX, and SBC
  • Dual Link: Support SBC only
  • Range: 50ft
  • Portable design
  • Compatible with Nintendo Switch and 3DS
  • Built-in battery for up to 14 hours use

If portability is something that is a priority for you, then the Mpow BH390A is your best bet. Its 6.89 x 4.45 size and 3.52 oz weight would be perfect if you intend to tote this transmitter when you travel as it won’t take much space in your bag.

Its Qualcomm chip ensures that you get high-quality audio both in RX and TX mode. Handsfree calls are also possible because this device has a built-in mic and a noise-reduction chipset.

Unlike most transmitters on this list, this doesn’t only work on TVs and typical audio sources. This is also a great choice for gamers who are looking for an affordable and versatile transmitter. since it’s also compatible with consoles like the Nintendo Switch and 3DS, among others. It can also work with your car stereo so you’ll be fixed on the way to your workouts!

However, the Mpow BH390A is the cheapest transmitter we have on the list so you can expect that there are some drawbacks here. For one, the range is not as good as the others, with only 50 ft. There’s no bypass mode with this one, too. And as for the battery, it will last you up to 14 hours, which, while not bad, is not the best we’ve seen either.


Avantree Audikast Plus

Best for Airpods
Close look at Avantree Audikast Plus (From: Amazon)
Close look at Avantree Audikast Plus (From: Amazon)

Key features:

  • Audio Output: AUX, RCA, Optical, USB
  • Transmission Mode: TX/RX
  • Audio Codec: aptX, aptx LL
  • Dual Link: Support aptX LL
  • Range: 100ft
  • Has Display Interface
  • Easy to hide
  • With volume control function

The Avantree Audikast Plus is the transmitter for you if you’re mainly looking for something that would work amazingly with your AirPods. Of course, it delivers great synchronized sound when you use other headphones with aptX LL tech. And it has dual-link mode so you can connect two compatible headphones at the same time.

But one of the things that make this stand out from the rest is its built-in volume control function. This is specifically to address one of the most common frustrations users have for AirPods (or other similar earbuds) — the lack of easily accessible volume controls.

The Avantree Audikast Plus also has a cute and compact design. Its lack of antenna lets it take up less space and allows users to easily hide them away.

But it has shortcomings, too. The most glaring ones, which could be deal-breakers to some, are that it doesn’t function as a receiver and is missing the Bypass Mode.



  1. I’ve just discovered this great site. Thanks for al the good stuff!

    Will one of these bluetooth transmitters, paired with an appropriate receiver, work to send audio signal to my subwoofer in the corner of the tv room? I am guessing it would, but this is all new to me.

    If it would work, what would the advantages / disadvantages over wireless (2.5 GHz or 5 GHz) be? I am finding my 2.5 GHz wireless signal to the sub has tons of noise.


    — Tony

  2. Thank you for doing this research! I am into vintage hi-fi and vinyl, and was seeking a transmitter that could send the output from the headphone jack of my amplifier via Bluetooth to headphones. Requirements: Bluetooth 5.0, aptx HD, and able to be connected to wall outlet for operation (as well as able to run on battery). I chose the TaoTronics BAO-14. Here’s why: The Avantree Oasis Plus is Bluetooth 4.2, according to their website. It does have aptx HD. No battery. The TaoTronics is Bluetooth 5.0. And, according to their website and Amazon (as well as the markings on the unit) it also has aptx HD. You might want to add the Bluetooth version to your listings, and also add to your information on the TaoTronics that it has aptx HD.

    1. Maybe something has changed since this review and comment? As in the Avantree Oasis Plus website they list is as being Bluetooth 5.0. I’m considering buying the Oasis Plus and if they were ever made with BT4.2, let’s hope I do not get and older version device through the post.

    2. Yep, it looks like there are 2 versions of the Avantree Oasis Plus
      SKU: BTTC-500P-GRY-MOD1 (BT4.2, discontinued by Avantree but perhaps still some out there.
      SKU: BTTC-500P-GRY (BT 5.0)

  3. Ended up going with the TaoTronics and Bowers & Wilkins PX5. They work very well together. Both are Bluetooth 5.0, and support Aptx HD. I connected the TaoTronics to a line-out on the back of the stereo amplifier, rather than the headphone jack, and I think that provides a cleaner sound. The sound quality from the PX5 is amazing considering it’s wireless. It’s almost indistinguishable from wired. Also the range–I can go outside and walk almost to the next house before the connection starts to break up.

    1. Hi Raoul… I agree with you about connecting the TaoTronics to the line-out rather than the headphone jack. I am not sure why it would be true — increased noise from the phono connectors?

      Also, do you know if I could use my TaoTronics BAO-14 to drive my subwoofer (connected through the sub-out on the preamp to my powered sub in the back of the room). I don’t want to buy a bluetooth receiver for the sub without knowing if it will work, but I can’t see why it wouldn’t.


  4. Hi Tony, Seems like the subwoofer idea would work. Nice idea! A possible issue is latency, where the sub would be slightly delayed. Using a low-latency receiver should solve that. Curious to know how it works out for you!

    1. Thanks, Raoul. I will look into a low-latency receiver and give it a shot. I’ll report back…

      Be well!

  5. Hello,
    Your article was most informative. I’m still new to a lot of the new technology (being an old geezer). My wife wants to listen to the TV in our bedroom via earbuds or headphones when I’m sleeping. We don’t have a smart TV (Sharp LC-40LB480U). If we were to plug one of the above devices into the 3.5mm jack will the bypass mode work so that the TV’s built-in speakers could still be used? I don’t want to have to plug and unplug the device every night before I go to sleep.

    Inquiring minds want to know. Thank you for your assistance.

  6. As with so many things, it depends. On most equipment, plugging something in to the 3.5mm jack silences the built-in speakers. On some, however, there may be an option in the settings, accessed via your remote control, to keep the speakers on. You’d just turn the volume all the way down when you wanted the headphones only.

    The bypass function allows you to send the audio source through to an amplifier, speaker or wired headphones, bypassing bluetooth. It won’t activate your TV speakers if the 3.5mm earphone plug cut them off.

    Your TV may have a “line out” jack. If so, use that to send audio to the TaoTronics transmitter. Then your speakers won’t be silenced and you’ll just use the volume control for the speakers. The line out jack isn’t affected by the volume control.

    You could get a bluetooth speaker, put it at your viewing position, and pair the TaoTronics with it and with your wife’s earphones. That way either the earphones or the speaker, or both, could provide sound from the TV.

  7. I’ve never heard of a phone being used as a bluetooth receiver, but it’s an interesting idea. Phones usually transmit bluetooth signals to a bluetooth audio device, such as a powered speaker or headphones, or a car radio.

  8. thanks, this is great but are there bluetooth transmitter that have remote volume controls? haven’t been able to find one.

  9. My question is a little different. Can I connect one BT transmitter to my TV through the 3.5mm headphone/speaker out jam and run the audio through another BT RECEIVER going into my amp/receiver/home theater system (not sure which input that would involve)? Any help on this would be appreciated. And, if so, any recommendations on which one of these (or others) might work best? Thanks.

    1. I searched a lot about transmitters and receivers and as far as I found, it’s possible, the only thing that you should consider is to make sure that the transmitter and receiver both support low latency. Also check the inputs and outputs of the devices you have and the product you choose. One more thing, if you’re not short on budget you’d better buy the devices with latest bluetooth on them. There were even a few match tx/rx products in amazone.

  10. Hi, I am, sadly, a complete technophobe so I trust you can bear with me. I wear specs. so, for the sake of comfort, would prefer tws earbuds to watch TV. As I understand it Aptx LL is the necessary audio code to avoid latency problems. Unfortunately having trawled the net I’ve been unable to find any that specify that particularly. Could anyone help or advise if with the correct transmitter the lower rated Aptx. would be sufficient. Thanks in anticipation.

    1. Hi Mike–I read the reviews of tws earbuds on this site and it looks to me like the Tranya Sports are a good choice for what you want to achieve. You get Bluetooth 5.0, so you’ll have the best tech for latency and range. If your TV already has Bluetooth, see how these earbuds work for you. If the Bluetooth version in your TV is older, and you’re not happy with it, you can add a separate transmitter that also has 5.0. Hope this helps.

      1. Hi Raoul , thanks for your help. I looked into Tranya earbuds and was fortunate to find an address for their customer support and asked for their advice. Sadly none of their products support Aptx LL. Since I already have buds with Aptx I shall do as you suggest and buy a transmitter and see how it goes. Regards Mike.

  11. HI I have a Samsung 55 tv model U A 55 N U 7100 . Samsung tell me this set is not fitted
    for Bluetooth,can you recommend a transmitter with optical input for this T V .

    Thanks Len Palmer

  12. Hi Len, I’ve been very pleased with the Tao Tronics BAO14. It has both analog and optical inputs, and aptx low latency (as well as hd) so you get great sound and long range.

  13. I’ve just stumbled across this as I have just bought the Taotronics BA07, which is the younger, cheaper brother of the BA-14 reviewed above. I have this plugged into my TVs 3.5mm jack to some APTX headphones but I’m having an issue where if there is silence during the movie/tv show then the transmitter pauses and kick in again when there is sound but by this point I have missed the first bit of the sound. Taotronics says the unit goes into ‘mute’ automatically and there is no way of stopping that.
    Can I ask if any of the units reviewed have the same issue? And if there is anyway round this?

  14. I have a Sony TV model: KDL50R550A. I am planning to buy an Avantree Bluetooth Oasis Plus to watch streaming tv with my bone conduction wireless headset Aeropex for audio reception.

    Do you think Aeropex would be a good match for Oasis Plus?

  15. Most of the devices do not have power on-off switch. As a result, when it is not in use, the device’s red light blinks continuously . Is it ok to leave the device with a blinking light ?

  16. Seems like you guys know your Bluetooth.
    Is there a device / Bluetooth transmitter that I can plug into a projector so that I can connect 6 Bluetooth headphones to the audio source?

    I know most devices can connect 2 sources… Struggling to find more.

    I am wanting to screen an outdoor movie, with headphones.

    Inputs are RCA, hdmi and optical.

    Thanks in advance

  17. Hi! Thanks for this article.

    A common problem with BT transmitters seems to be that they will cut out when the volume is low

    Watching tv this is really annoying when there’s only background noise. Do you know of any transmitters that don’t do this?

    Explanation from TaoTronics:
    “Due to mute function designed for decreasing noise and saving power, it stops transmitting if the sound is too low and below DB level threshold. It is common in most transmitters.”

    Thank you so much!

  18. I use the Tao Tropics BA0-14 transmitter for TV viewing and haven’t noticed this cutting out problem. If it does stop transmitting when there is a quiet moment, it must be responding to the return of sound instantly, as I’m never aware of anything missing. I think the latest versions of Bluetooth don’t have this problem. I do recall that older Bluetooth headphones would cut out when there was silence (you could tell because the hissing would stop!) and then miss the first bit if sound when it returned. Perhaps you’re using some older equipment?

    1. Thanks so much for your quick reply! I am using TT BA09 in combination with sony wh1000xm3. Both not old, I would say… any other ideas? 🙂

  19. Hello I wanna know on what do you think of ( Alura tech ) or ABCTV KIT need to know comments on it specs , price and why did they stop making it. Thanks

  20. Hi:
    I followed your recommendation and bougt an avantree oasis plus.
    Ok. Here’s the main issue: why do i need a bypass optical signal if I must change digital audiotransmission from dolby to stereo, because this expensive device simply doesn’t decode dolby information to translate into stereo? It has nonsense!
    In my location, I cannot bu 1mii pro, but, before you buy one transmitter like this, please check what do you really need. I guess many times cheaper devices do the same job.

  21. My question is, have you had any experience with connecting Hearing aids to TV I have just purchased a pair of Signia hearing aids.(Model # HA PURE C&G 3AX) the manufacturer claims they have blue tooth and they do because I can control them with my android A20 Samsung cell phone, so far, I am unable to get my Sony TV model XRB-49X800H (Sony says it has Version 4.2) , to recognize the hearing aids when I try to pair them. Sony also suggested down loading Blue tooth from other sources. which i am hesitant to do. Can you suggest something here, as the listening to TV thru Head phones is not great when you want to talk to your wife of 53 years Thank you in advance Ted Livingstone.

  22. The Avantree Audikast is a BT transmitter. The name implies it. So it is not a shortcoming if it does not work as a receiver.

    But what is a missing feature is a remote volume control. To use the ‘+’ and ‘-‘ buttons on the little box means you have to get up every time you want to adjust volume, or to have it on your lap connected with very long cables.

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