Use car's AUX signal for HD audio transmission. Function via bluetooth-enabled devices. bluetooth 5.0. Eliminate the clutter caused by cables and cords. 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. Can answer the phone in clear sound. 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. Specification 1. Name: Audio Cable Adapter 2. Model: E16715 3. Transmitter Distance: 15m 4. Frequency Response: 20Hz-20KHz 5. Frequency Range: 2.402-2.480GHz 6. Distortion rate: less than equal 1% 7. Current: 20mAh 8. bluetooth name: JieRi-BT 5908 9. bluetooth version: 5.0 10. Product voltage: 12V 11. Microphone Length: 150cm 12. Applicable models: For For For For SMART 451 colour:Black+yellow Material:ABS Package Contents: 1 * Audio Cable Adapter 1 * bluetooth Microphone Notices: 1. don't confirm 100% to compatible above car model years.please make sure that connector can fit for yor car before you order. 2. Professional installation is recommended. 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.