Function: 1. Designed as a replacement for RNS 310, RCD 310, and other compatible models to meet your needs effectively. 2. Pair your device via Bluetooth and select AUX on the radio to play music through the car speakers. 3. Listen to music and take calls using Bluetooth 5.0 for clear audio and a stable connection. 4. Features Bluetooth 5.0 protocol, backward compatible with Bluetooth 2.0, 3.0, and 4.0. Simple plug-and-play operation. 5. Supports decoding of common audio formats including MP3, WMA, WAV, and FLAC. 6. Supports DSD high-resolution audio transmission with stable data transfer and high fidelity, ideal 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 may vary) Installation: Replacement for RNS 510 Replacement for RNS 310 Replacement for RCD 300 Replacement for RCD 310 Replacement for RCD 510 Package List: 1 x Car Microphone 1 x Bluetooth AUX Adapter Note: When using for the first time, activation may be required using a diagnostic tool. Locate the socket in the vehicle (typically on the back of the radio). Install directly and connect the power cord. Turn on the device; the Bluetooth indicator will flash. Enable Bluetooth on your phone and complete pairing. Once connected, activate the AUX input on the head unit and play audio from your device.