Function: 1. Compatible with RNS 310, RCD 310, RNS 510, RCD 300, and RCD 510 for seamless integration. 2. Connect your device via Bluetooth and select AUX on the radio to play music through car speakers. 3. Stream 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. Plug-and-play design for easy use. 5. Supports MP3, WMA, WAV, and FLAC audio format decoding. 6. Supports DSD high-resolution audio transmission with stable data transfer and high fidelity, ideal for music lovers. 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: - Locate the socket in the vehicle (on the back of the radio). - Install directly and connect the power cord. - Power on the device; the Bluetooth indicator will flash. - Enable Bluetooth on your phone and pair the devices. - After successful pairing, activate the AUX input on the head unit and play audio from your device. Package List: 1 x Car Microphone 1 x Bluetooth AUX Adapter Note: For first-time use, activation may require a diagnostic tool.