1. shell material: metal 2. Shell surface technology: high-gloss 3. features: USB port 5V power supply, 3.5mm AUX output, built-in high-sensitivity microphone, Bluetooth hands-free communication, music playback sound quality clear, 3.5mm interface compatible with a wide range of 4. Input: USB 5V 5. audio output: 3.5mm AUX 6. Retractable spring cable for durability. 7. Bluetooth hands-free communication, music playback, navigation broadcasting 8. Bluetooth protocol: Bluetooth 5.2, A2DP, built-in microphone. 9. audio bluetooth receiver.
