Specification: Item Type: Helmet Headsets_x000D_Material: ABS_x000D_Color: As Pictures Shown _x000D_Weight: Approx. 102g/3.6oz_x000D_Bluetooth version: V4.1+EDR_x000D_Frequency range: 2.402GHz-2.480GHz_x000D_Transmission distance: 20-30 meters/65.6-98.4ft (transmission distance varies due to environmental factors and different Bluetooth devices of mobile phones)_x000D_MIC distance: 1 meter/3.3ft_x000D_Lithium battery: 180mAh_x000D_Charging time: about 1 hour_x000D_Bluetooth name: BT8 Features: 1The earphone is soft and comfortable without pinching the ears, fits the ears, ergonomic design. 2Bluetooth stable connection, automatic answering, rejecting calls, voice calls and playing music. 3Super battery life. Compatible with most motorcycle helmets. 4Reduce background noise, with stereo sound, can enjoy wonderful music. 5Chinese and English switching method: double click the boot button if the Bluetooth is not connected. PackageList: 1 xHeadset 1 x Charging Cable 1 x Manual