Item Type: Microphone Adapter Material: ABS Voltage: DC12V Bluetooth: Bluetooth 5.0 Length of Microphone Cable: Approx. 150cm/59.1in (There will be errors in manual measurement.) Fitment: Fit for Premium5, MCD, MFD1 Fit for DX/MFD1, MS303/501/502, Symphony CD & Kassette, SatCompass Installation: 1. Find the socket of the pin on the car (on the back of the radio) 2. Install it directly and install the power cord. 1You can use your phone to play music by car speakers after matching your phone or tablet to bluetooth and choosing auxiliary from your radio. 2More stable connection, remarkable performance, easy to plug and play installation and give you efficient music transmission. 3Support DSD large?capacity transmission, stable data transferring between devices, high fidelity, enjoyment for music enthusiasts. 4Adopt bluetooth 5.0 protocol and you can answer the call with clear sound, also backward compatible with 2.0, 3.0, 4.0 and other versions. 5Support common MP3 format audio, also for WMA, for WAV, for FLAC, and other audio format, non?general ordinary bluetooth function. 1 x Car Microphone 1 x AUX Bluetooth Adapter 1 x Signal Wiring Harness