1.Super sound quality, high volume. 2. Noise reduction capability: above 120 per hour 3. You can connect two mobile phones at the same time. 4. It can be connected to the mobile phone to realize the functions of automatically answering, rejecting calls, voice calls and playing music. 5. Waterproof grade: IP67 Battery model: 800mAh lithium battery Rechargeable: -USB Waterproof grade: IP67 Bluetooth version: 5.1V 8.0 noise reduction Intercom distance: 1200 meters Playing time: more than 20 hours Standby time: 400 hours Charging time: 2.5 hours Battery capacity: 800mAh Bluetooth Mode: Double Mode Intercom number: 2 people at the same time, 6 people switch Connection : series connection Colour:black Material:plastic Package Contents: 1 x Motorcycle bluetooth headset Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.