Use car's AUX signal for HD audio transmission. Function via bluetooth-enabled devices. No functional limitations of the car radio. Allows you to connect an external audio source. Integreated intelligent voice noise reduction tenology to reduce and noise. The product uses digital audio processing to restore HIFI sound quality. Installation: Red power cable connected to 12V+ Black power cable connected to 12V- Plug into the CD player Jack (please confirm corresponding socket), mobile phone is connected with the bluetooth module, aux audio source selection, you can play mobile phone music. Name: Audio Cable Adapter Transmitter Distance: 15m Frequency Response: 20Hz-20KHz Frequency Range: 2.402-2.480GHz Distortion rate: less than or equal to 1% Current: 20mAh Bluetooth name: JieRi-BT 5908 Bluetooth version: 5.0 Product voltage: 12V Microphone Length: 150cm Applicable models: For Q3 A3 R8 Colour: black Material: ABS Package Contents: 1 * Audio Cable Adapter 1 * Bluetooth Microphone Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.