5.0 Bluetooth Transmitter Receiver Mini 3.5mm AUX Stereo Wireless Bluetooth Adapter For Car Music Bluetooth Transmitter For TV

92% of buyers enjoyed this product!
Bluetooth Standard:
Bluetooth V5.0
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Note: when you first insert KN320, the light is Red, it is in TX (Transmitter)Mode, which will not switch to RX Mode automatically. It needs you to unplug the KN320 and then insert again, the light will become Blue, and it is in RX(Receiver) Mode now.

Sometimes when it is in the same mode for long time, you need to repeat unplug and insert twice and it will change to the other mode, please remember:

Red Light: TX Mode, Blue Light: RX Mode

Transmitter mode (Red light): 1.Plug the KN320 to your usb power, Switch to Red Light flashing; 2.Use the 3.5mm AUX/RCA cable to connect the KN320 with your non-Bluetooth e.g.TV/PC/Mac/Laptop/CD Player/MP3/MP4; 3.Turn on your bluetooth headphone or bluetooth earphone into pairing mode. 4.Put it near to KN320, Then it will automatically pair with your Bluetooth headphones or bluetooth speakers(When paired successfully,Red light will Stop flashing).Then you can listen sound from the TV/PC/Mac/Laptop to bluetooth headphone/bluetooth speaker.

Receiver mode (Blue light): 1.Plug the KN320 to your usb power,Switch to Blue Light flashing; 2.Use the 3.5mm AUX/RCA cable to connect the KN320 with your non-Bluetooth e.g.Car/Wired Speaker/Amplifier; 3.Open your Tablet/Smartphone’s bluetooth,Search the KN320,Then pair with it(When paired successfully,Blue light will stop flashing). Then you can listen sound from the tablet/smartphone to your Car/Wired Speaker/Amplifier.

Please read the follow General Q&A carefully before placing an order or leave us a negative review.

Q1: Why i can not find the KN320 in my computer?

A: When you plug the KN320 to your computer usb port, The computer’s usb port just be used as a power supply for the KN320. So the computer don’t needs to see it, you just need to connect it with PC by 3.5mm AUX cable so it will work for PC. When using for PC, you must use TX mode(Red light blinking). Then pair with your Bluetooth earphone/speaker.

Q2: Why i can not find the KN320 in my smart phone bluetooth ?

A: When you use the KN320 to pair with your phone, you need to confirm the KN320 was in bluetooth receiver mode (LED light should be BLUE blinking).If the light was red blinking,Its bluetooth transmitter mode ,not receiver mode ,so you can not find it in your phone.

Q3: Why i can not pair with my bluetooth earphone ?

A: When you use the KN320 to pair with your bluetooth earphone, you need to confirm the KN320 was in the bluetooth transmitter mode (LED light should be RED blinking). Aux should be connected with PC and KN320. If the light was blue blinking,its bluetooth receiver mode ,not transmitter , so you can not pair with your bluetooth earphone.

Q4: How to change between bluetooth transmitter(RED light) and receiver mode(BLUE light) .

A: Red light was blueooth transmitter mode; Blue light was bluetooth receiver mode;The way to change the light was re-plug the USB device to your usb power supply.

Q5: Why i connect successful,but its don’t have sound?

A: In transmitter mode(Red light): You need to use the 3.5mm audio cable to connect your TV/PC/Tablet with our KN320. Noted, The 3.5mm cable should be pluged into your TV/PC/Tablet’s 3.5mm audio output. In receiver mode(blue light): You need to use the 3.5mm audio cable to connect your Amplifier/wired speaker/car audio system with our KN320. Noted, The 3.5mm cable should be pluged into your Amplifier/wired speaker/car audio system 3.5mm audio input.

Q6: Can i use for my wireless keyboard/mouse ?

A: Not support !! 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.

Q7: Can i use it to connect between phone and Amplifier/wired speaker/car audio system etc?

A: Yes ,but you need to confirm your Amplifier/wired speaker/car audio system have 3.5mm audio output port.

Q8: Can i use it to connect between bluetooth earphone/speaker and TV/PC/Tablet/CD Player/MP3/MP4 ?

A: Yes. But you need to use the 3.5mm cable plug into your TV/PC/Tablet/CD Player/MP3/MP4’s 3.5mm AUX audio port. Then connect with our device.

Q9: Why when i connect with the KN320, Its have noise or the sound weak ?

A: Its because you used the USB Power supply can not suitable for KN320, You need to change another USB power supply and confirm the USB power supply only support DC 5V output, Can not support 9V/12V or various output.

Q10: What’s the different of color 1 and color 2?

A: Its the same function, The difference is that the appearance pattern of the product,So just select the appearance pattern you like.

Package Content
1x Bluetooth 5.0 Transmitter/Receiver Adapter (Color 1 and Color 2 was the same function,just appearance pattern different)
1x 3.5mm Aux Cable
1x User Manual

Product Features:

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.There is no built-in battery, and it is powered by DC 5V usb interface:
A.Insert usb power, the red light is on in the transmitting mode, the red light flashes when pairing, and the red light is always on after the pairing succeeds.
B.Insert usb to power on, the receiving mode is blue light, the blue light flashes when pairing, the blue light is always on after pairing is successful.
5.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.

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


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 10-20 Business days
Canada, Europe 10-20 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.


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