BT12 Motorcycle Helmet Headset Bluetooth Wireless Handsfree Call Kit Stereo Anti-interference Waterproof Speaker Moto EarphoneProduct Details-Color: Soft Mic NO Box-Bluetooth version: V5.0 EDR-Standby: 120Hours-Transmission distance: 10M (transmission distance varies depending on environmental factors and mobile phone Bluetooth devices)-MIC distance: ≤ 1 meter-Lithium battery: 3.7V/1000mA-Frequency:2.402 Ghz-2.480 Ghz.-Bluetooth Pairing Distance:20-30 meters(Depending on device)-Playback time:30 hours.-Charging time:=1 hours.-Standby time:=360 hours.