Bluetooth 5.1 for stabletransmission Bluetooth 5.1 fits CSR Bluetooth enhanced speedrate, can greatly improve the Bluetooth data transmission rate, and also achieve low power consumption, better sound quality and easier connection Intercom switch 2 riders talking, real-time intercom for 2 riders Low power consumption, telephone talking time 24hAfter circuit optimization, power consumption is reduced by 20%, phone call time up to 24 hours, music playback up to 30 hoursCVC noise cancellationtechnologyCvC is a kind of noise cancellationtechnology software. The principle is to reduce noise through built-in software and microphone, in addition to eliminate some kinds of reverberation noise. Voice assistant No need to take out the phone, long press the call button to wake up the voice assistant. IP65 waterproof High degree waterproof, freely use in rainy day. EUC remote control (optional accessories )Additional choice for handle control, making driving comfortable and safe. Designed for those rides who prefer high-quality products. Packing list: 1 x Q2 main unit 1 x headset 1 x microphone 1 x charger with USB cable 1 x mounting clamp and double-sided tape 1 x USB Type-C charging cable 1 x user manual Optional remote control