Features:Use car's AUX signal for HD audio transmission. Function via bluetooth-enabled devices.bluetooth 5.0. 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. Description:The bluetooth main control chip is used to reserve the AUX audio input function through the car. The car bluetooth music player has wireless music transmission function, for the old and current car audio. Because many consumers find that listening to music is very troublesome. If there is no audio input port, you need to burn the disc, and the disc is slow to update, which is inconvenient. In many old stereos, the car has reserved AUX external input function, so this product canuse the hidden function to support online music playback. In the streaming media era, online APPs are quite convenient, and the is updated in time. Features:Use car's AUX signal for HD audio transmission. Function via bluetooth-enabled devices. bluetooth 5.0. 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. Description:The bluetooth main control chip is used to reserve the AUX audio input function through the car. The car bluetooth music player has wireless music transmission function, for the old and current car audio. Because many consumers find that listening to music is very troublesome. If there is no audio inputport, you need to burn the disc, and the disc is slow to update, which is inconvenient. In many old stereos, the car has reserved AUX external input function, so this product canuse the hidden function to support online music playback. In the streaming media era, online APPs are quite convenient, and the is updated in time. 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 Transmitter Distance: 15m Frequency Response: 20Hz-20KHz Frequency Range: 2.402-2.480GHz Distortion rate: less than equal 1% Current: 20mAh bluetooth name: JieRi-BT 5908 bluetooth version: 5.0 Product voltage: 12V Microphone Length: 150cm Applicable models: For KCM-123B M-BUS 9501 9503 9823 9825 Name: Audio Cable Adapter Colour:Black Material:ABS Package Contents: 1 x Audio Cable Adapter,1 x bluetooth Microphone Only the above package content, other products are not included. Note: Light reflection 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.