Features: 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 high?quality audio format decoding. 6.Support DSD large?capacity transmission with stable data transmission and fidelity between devices, designed for music enthusiasts. Specification: Item Type: Microphone Adapter_x000D_ Material: ABS_x000D_ Voltage: DC12V_x000D_ Bluetooth: Bluetooth 5.0_x000D_ Microphone Cable Length: Approx. 150cm/59in (manual measurement will have errors)_x000D_ Fitment: _x000D_ Replacement for RNS 510_x000D_ Replacement for RNS 310_x000D_ Replacement for RCD 300_x000D_ Replacement for RCD 310_x000D_ Replacement for RCD 510 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._x000D_ Note that the first time you use it, you need to use the diagnostic tool to activate it.