The usb mode does not need to use 3.5 audio cables. It can be directly plugged into the car usb interface and speaker usb interface, and can be used directly after pairing with the mobile phone..

The car usb interface and speaker usb interface must support usb audio output.

AUX Mode requires that one end of the 3.5 audio cable be connected to the kn318 audio interface, and the other end be connected to the car 3.5 audio interface and speaker 3.5 audio interface.

It can be used after pairing with the Bluetooth of the phone,but cannot be used on Computer.

Built-in microphone allows you to make hands-free calls through the microphone on the KN318 when making phone calls, making it very convenient to use in the car.

Technologies: BT5.1, A2DP, AVRCP

Operation Range: Up to 10m / 33ft

Pairing name:KN318

Pairing: blue LED flashing

Paired successfully: The blue light keeps on

Size: As Picture

Color:As Picture

1Pc x Bluetooth 5.1 Audio Receiver Adapter

1Pc x 3.5mm Aux Cable

1Pc x User Manual

We don't offer retail package,but we will pack it well before shipped out.

Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you buy.

Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!