Usage Tips:Function: 1. A better choice of replacement for RNS 310, replacement for RCD 310 and so on to meet your requirements accurately and better. 2. Match your device to bluetooth and select AUX from the radio, and you can use your device to play music through car speakers. 3. You can listen to music from your bluetooth device and answer calls with bluetooth 5.0, get clear sound and stable connection. 4. Adopt Bluetooth 5.0 protocol, backward compatible with 2.0 3.0 4.0 other versions of Bluetooth protocol. Convenient to use, plug and play. 5. Support common MP3 audio format and WMA, WAV, FLAC and other high quality audio format decoding. 6. It supports DSD high-capacity transmission with stable data transmission and fidelity between devices, designed for music enthusiasts. Specification: Item Type: Microphone Adapter Material: ABS Voltage: DC12V Bluetooth: Bluetooth 5.0 Microphone Cable Length: Approx. 150 cm / 59 in (manual measurement will have errors) Installation: Replacement for RNS 510 Replacement for RNS 310 RCD 300 replacement RCD 310 replacement RCD 510 replacement Package List: 1 x Car Microphone 1 x Bluetooth AUX Adapter Note: Note that the first time you use it, you need to use the diagnostic tool to activate it. Find the socket in the car (on the back of the radio). Install directly and connect the power cord. Turn on the device, the Bluetooth indicator will flash, then turn on the phone to match Bluetooth. After the Bluetooth matching is completed, open the host AUX module and play the AUX audio to complete the playback.