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Stereo Wireless Adapter Audio Receiver Transmitter Bluetooth (5.0)

27 reviews
100% of buyers enjoyed this product! 1754 orders
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1. Our device only can be used as bluetooth receiver or bluetooth transmitter. Can not be used as a WiFi/Wireless adapter to connect with WiFi network and dose not work with keyboard / mouse.
2. When you use our device to be as bluetooth transmitter or bluetooth receiver , you need to use 3.5mm AUX cable to connect your device with our device(because the 3.5mm AUX cable was used for audio input or output), then it can be into the pairing mode,and you can pair with your devices.

Technologies: BT5.0, A2DP, AVRCP (receiver mode only)
Operation Range: Up to 10m / 33ft (without any blocking objects)
Pairing name(Receiver mode ):KN320
Transmitter mode: red LED light is on
Receiver mode: blue LED light is on
Dimensions: 32mm*17mm*8.5mm

Package Content:
1x Bluetooth 5.0 Audio Transmitter/Receiver Adapter
1x 3.5mm Aux Cable
1x User Manual

1. This extremely portable, lightweight wireless audio transmitter & receiver is an ideal wireless audio solution for a wide range of situations and uses
2.Transmitter mode: wirelessly streams audio from your non-Bluetooth TV, home stereo system, or CD player to your Bluetooth headphones or speakers
3. Receiver mode: wirelessly streams audio from your Bluetooth-enabled phone, tablet, or computer to your wired stereo, speakers, or headphones
4. Mode switching:
a) If the device has been in a mode for a long time, it needs to be re-energized twice to switch to another mode.
b) If the device has just switched mode, you want to immediately switch to another mode, you only need to re-energize once.
5. Pairing method
a) RX mode: Pairing name: KN320, find KN320 in the Bluetooth settings of the phone to pair. The blue light flashes during the pairing process, and the blue light stops flashing after the pairing is successful. Connect the product to the audio device with a 3.5 audio cable.
b) TX mode: TX mode will automatically search for other Bluetooth receiving devices (such as Bluetooth headset, Bluetooth speaker, Bluetooth receiver, etc.), the red light flashes during pairing, and the red light stops flashing after pairing succeeds. Connect the product to a device such as a TV with a 3.5 audio cable/RCA audio cable.
6. The KN320 just 32mm (1.26”) across and weighs only 3.2g (0.11oz), but has got powerful wireless audio streaming capabilities. Slip this transmitter & receiver into your backpack or laptop bag and take it on-the-go without the slightest effort.
7. Broad Compatibility: With the included 3.5mm cable, this Receiver Transmitter adapter can widely be used on your computer, laptop, home stereo system, headphone, smartphone, Mp3 player, CD player, etc.


We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.

How do you ship packages?

Packages from our warehouse in China will be shipped by ePacket or EMS depending on the weight and size of the product. Packages shipped from our US warehouse are shipped through USPS.

Do you ship worldwide?

Yes. We provide free shipping to over 200 countries around the world. However, there are some locations we are unable to ship to. If you happen to be located in one of those countries we will contact you.

What about customs?

We are not responsible for any custom fees once the items have shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.

How long does shipping take?

Shipping time varies by location. These are our estimates:
Location *Estimated Shipping Time
United States 10-30 Business days
Canada, Europe 10-30 Business days
Australia, New Zealand 10-30 Business days
Central & South America 15-30 Business days
Asia 10-20 Business days
Africa 15-45 Business days
*This doesn’t include our 2-5 day processing time.

Do you provide tracking information?

Yes, you will receive an email once your order ships that contains your tracking information. If you haven’t received tracking info within 5 days, please contact us.

My tracking says “no information available at the moment”.

For some shipping companies, it takes 2-5 business days for the tracking information to update on the system. If your order was placed more than 5 business days ago and there is still no information on your tracking number, please contact us.

Will my items be sent in one package?

For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.

If you have any other questions, please contact us and we will do our best to help you out.


Order cancellation

All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.


Your satisfaction is our #1 priority. Therefore, you can request a refund or reshipment for ordered products if:

  • If you did not receive the product within the guaranteed time( 45 days not including 2-5 day processing) you can request a refund or a reshipment.
  • If you received the wrong item you can request a refund or a reshipment.
  • If you do not want the product you’ve received you may request a refund but you must return the item at your expense and the item must be unused.

We do not issue the refund if:

  • Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
  • Your order did not arrive due to exceptional circumstances outside the control of (i.e. not cleared by customs, delayed by a natural disaster).
  • Other exceptional circumstances outside the control of

*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on Contact Us page

If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.


If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.

Please do not send your purchase back to us unless we authorise you to do so.

Real customer reviews

27 reviews
100% of buyers enjoyed this product!
5 stars
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1 star
verifed buyer
15 Dec 2020

This little device allows bluetooth Speakers on any device with a few tricks. First you will need an AC adapter to 5 volt to power this device. You TV requires an earphone jack. That's it. Plug your adapter into an AC. Plug this into the 5 volt power until the led is red. If it is blue remove from power and plug in again. It should now be red. Plug you earphone cable into the earphone jack on your T.V. Turn on wireless speaker and wait for it to connect to TV All done. Do not use usb jack on tv as It may or may not work that way.

verifed buyer
13 Dec 2020

After some trial and error I got this to work flawlessly. I didn’t use the supplied 3.5mm cord so I had to change out the 3.5 mm cord so that the other end of it could fit with the cable box cable as it’s plugged into there. In this set up the TV and headphones (as long as the headphones are powered on and wait until Bluetooth connects and they always have sound, therefore all you have to do is turn the TV volume all the way down or mute it. My TV has only one USB, so I have a USB slot expansion device thats this s transmitter is plugged into and it still works perfectly.

verifed buyer
7 Dec 2020

It works great, as a transmitter the delay is very minimum, I recommend it for the price.

verifed buyer
25 Nov 2020

Easy to connect. Convenience

verifed buyer
19 Nov 2020

Those what I need it for not the best but getting the job done.

verifed buyer
7 Nov 2020

Item worked as described very good product

verifed buyer
15 Oct 2020

Works awesome easy to use awesome praise fast shipping

verifed buyer
26 Sep 2020

Super inexpensive, super easy to pair, and audio quality is outstanding! I'm using it to steam music off my phone and pipe into my car's audio port.

verifed buyer
25 Sep 2020

My car only streams calls on bluetooth but with this i can instantly replace my aux connector. My car has a usb port next to it so i can connect both and hide it without wires hanging out. I dont have to worry about recharging since its connected to a usb port so i can leave to drain and when i turn the car it automatically turns on with no hassle. For its price i recommend to those wanting to get ride of aux cords. The sound quality has more bass but nothing a treble cant help. Aux will always have better quality sound but this device almost rivals it so there is no loss here. Recommend

verifed buyer
9 Sep 2020

Great Product, works really well. I installed it in my 2011 Ford Expedition because the default sound source is line in instead of factory Bluetooth which is annoying, I thought I would give this a try and it works great my phone connects quickly to this device. I use the receive Bluetooth and probably will never use the transmit. I like the fact now that my music starts playing as soon as I start the vehicle. I have the phone connect to my vehicle factory Bluetooth for phone use and the music/audio to this device. Sound quality is great and this device is small and is installed in my console USB and 1/8 audio line in port so its hidden and out of the way, exactly what I wanted. Comes with (2) 1/8 cables longer than the picture shows works great for me.

verifed buyer
4 Sep 2020

I have it on my boat radio that’s 10 years old and it works great. I haven’t tried it in the push mode yet but they receive mode is perfect.

verifed buyer
21 Aug 2020

Easy plug and play. It was a perfect fit for my father’s Christmas gift that needed the transmitter to connect Bluetooth headset to tv

verifed buyer
20 Aug 2020

Really like this as a transmitter on laptop. Use the USB for power and plug headphone jack into headphone right next to it for output signal. Linked easily to my home Bluetooth receiver!

verifed buyer
19 Aug 2020

I use this in my car I have a 2011 Scion XD. It hooked up immediately no issues and it sounds great. Totally worth the price I would buy it again, buying one for a family member as well. If you just want to stream music in your car and you don't want anything fancy this is the best $$$ you can spend.

verifed buyer
3 Aug 2020

I've tried FM transmitter and there was too much static, this is a great solution for my set up. My USB plug is right next to the 3.5mm Aux port in my car so it was perfect. It automatically links up to my phone every time I go in my car. The audio usually have a delay with Bluetooth but with Bluetooth 5.0 the delay is very minimal. Overall great product!

verifed buyer
29 Jul 2020

After trying for a week to get my LG Smart TV to work with Bluetooth headphones I bought my bf for his bday, I ordered this (third purchase I’d made trying to get what I was promised by others) and voila! 2 minutes later everyone was happy. I no longer get headaches from the TV blaring and he gets to zone out!!! Great sound quality, very comfortable. Happy family, happy life! Shipped quickly also.

verifed buyer
26 Jul 2020

Works for my needs and it's inexpensive but very effective. I'm pretty pleased so far.

verifed buyer
20 Jul 2020

I mainly bought it for my car as i have a 3.5mm aux input but no working bluetooth for media; until now. It works perfectly. It's simple and to the point with a low profile.

verifed buyer
7 Jul 2020

Very simple and intuitive to use. I just received mine and tested it on both my TV and car USB ports.

verifed buyer
3 Jul 2020

I wanted a way to connect a small projector to a wireless sound bar to get better sound while watching movies outdoors or to allow people outside to hear sounds when I project Halloween videos out the front window. This worked perfectly for what I wanted. For power it plugs into the USB connector on my projector and the audio output of the projector for sound. It was a little tricky pairing it to the sound bar since neither has a display. I had to turn off all other nearby bluetooth devices so they didn't interfere, but once they paired it worked perfectly.

verifed buyer
9 Mar 2019

I love this device. Plugged it into my projector and paired it with a bluetooth speaker.

verifed buyer
8 Mar 2019

Amazed at the range of this device. I can be in another room and still have a good connection. Pairs easily and works with several headsets. Would buy again.

verifed buyer
15 Feb 2019

I got this for connecting my headphones with TV via Bluetooth. I was surprised how easy it was to hook it up and use it. Worked like a charm on my TV and Bose headphones.

verifed buyer
25 Jan 2019

Easy to use, easy to pair. It just works. Sound is very good, I just needed to fiddle around with the volume control on the speaker.

verifed buyer
23 Jan 2019

Easy to use, sound quality is great, distance from phone to speaker is long and still works fine, and product quality looks great.

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