1. Using BK Bluetooth master chip, Bluetooth 5.0 version, high-speed transmission without distortion, and the sound quality can reach high-definition standards. 2. The car Bluetooth music player has wireless music transmission function and is aimed at car audio. Using Bluetooth transmission, you can say goodbye to messy, and you can also play music online. In the era of streaming media, various online APPs are quite convenient, and the audio source is updated in a timely manner. 3. This product is aimed at different brands of vehicles, and is equipped with different connectors and plugs according to the reserved interface behind the original car host. The product uses a wide range of voltage input to adapt to different use environments. 4. Use Bluetooth music: tap the function key once to change the next song. Long press the function key for two seconds to switch to the previous song. 5. If the call comes, tap the function key to answer the call. If you need to hang up, tap the function button to hang up. 6. The product adopts high-end Bluetooth module with noise reduction filter function. The product uses digital audio processing to restore HIFI sound quality. 7. Bluetooth name: JieRui-BT 5408 8. Bluetooth version: 5.0 9. Voltage: 5-12V 10. Applicable to DEH-P 2500 R, DEH-P 2600 R, DEH-P 3500 MP, DEH-P 6600 R, DEH-P 9600 MP DEH-P 3100 UB, DEH-P 4100 SD, DEH-P 5100 UB, DEH-P 7100 BT, DEH-P 8100 BT DEH-P88RS-II, DEH-P88RS, etc.