Feature:1. A better choice of replacement for RNS 310, replacement for RCD 310 and so on to accurately and better meet your demands.2. Match your device to bluetooth and choose AUX from your radio, and you can use your device to play music through car speakers.3. You can hear music from your device with blueooth function, 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 format audio, and for WMA, for WAV, for FLAC, and other highquality audio format decoding.6. Support DSD largecapacity transmission with stable data transmission and fidelity between devices, designed for music enthusiasts.Specification:Item Type: Microphone AdapterMaterial: ABSVoltage: DC12VBluetooth: Bluetooth 5.0Microphone Cable Length: Approx. 150cm/59in (manual measurement will have errors)Fitment: Replacement for RNS 510Replacement for RNS 310Replacement for RCD 300Replacement for RCD 310Replacement for RCD 510.Package List:1 x Car Microphone 1 x AUX Bluetooth Adapter Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.Note that the first time you use it, you need to use the diagnostic tool to activate it.