USB Bluetooth Receiver 5.1-with 3.5mm AUX. Just Plug in the USB Interface. Suitable for Car/Wired Speaker/Home Stereo Music Streaming, Built-in Microphone, Hands-Free Call (Black)

• ►Bluetooth adapter USB 5.1: Our bluetooth adapter adopts the latest receiving technology, which has a wider range of compatibility and stronger signal acceptance. Suitable for most audio output devices such as cars, stereos, etc.
• ►Plug and play: No need to install drivers/software, Bluetooth quickly matches and connects. Pairing: the blue led light flashes, pairing is successful: the blue light keeps on.
• ►Easy to use: Our products are suitable for most car models. They can be used directly by plugging into the USB inter-face and can be connected to the device for long distances, up to 33 feet (10 meters) indoors.
• ►Hands-free: Our Bluetooth receiver is small in size and light in weight. Built-in microphone, high-definition hands-free call, make your driving and office more convenient.
• ►High performance: Automatically turn on/off when starting/stopping the engine or turning on/off the speaker, thereby reducing power loss and protecting the car and products; connect immediately after Bluetooth is turned on and automatically connect to the device without repeated connections.

Name: Bluetooth 5.1 Audio Receiver Adapter Colour: Black Model: KN318 Technology: BT5.1, A2DP, AVRCP Working range: up to 10m / 33ft Pairing name: KN318 Size: 32mm * 17mm * 8.5mm Weight: only 3.2 grams (0.11 ounces) Pairing: Blue LED flashes Successfully paired: the blue light is always on Package Contents： 1 x Bluetooth 5.1 audio receiver adapter 1 x 3.5mm auxiliary cable 1 x user manual -Easy to use and carry, plug and play, no driver installation required -Indoor and outdoor use, maximum 33 feet (10 meters), barrier-free -You can use many cars directly by inserting the USB interface. If some devices cannot be recognized after being in-serted into the USB interface, they must be connected to the USB interface and 3.5mmAUX at the same time to work normally. -Receiver USB mode: USB mode does not require the use of 3.5 audio cables. It can be directly inserted into the car USB port and the speaker USB port, and can be used directly after pairing with the mobile phone. -Receiver AUX mode: In AUX mode, you need to connect one end of the 3.5 audio cable to the kn318 audio interface, and the other end to the car 3.5 audio interface and the speaker 3.5 audio interface, and you need to connect the 5V power supply through the USB interface, and then you can pair with the phone's Bluetooth. -Bluetooth hands-free call: With the help of the built-in microphone, you can use the microphone on the KN318 for hands-free calls during a call, which is very convenient to use in a car. Note: The car USB interface and speaker USB interface must support USB audio output. Otherwise, the USB interface and 3.5mmAUX must be connected at the same time to work normally.