Quantity 1 piece(s) Material ABS Color Black Type Electronic device Function Communication in 6 riders one rider can pair with 5 riders and can choose which person of the group to talk at a time; Real full duplex wireless communication in 6 riders by Bluetooth system; Up to 120km/h working speed; Safe auto receiving cell calls; Advanced A2DP & EDR Bluetooth profile; Stereo music / audio function (transmits from A2DP enabled cell phone / MP3 / GPS); Wind noise DSP cancellation; Water resistance Transmission Range Max. 10 m Intercom Function Yes Intercom Effective Distance Max. 1000m Power Supply 500mAh Li-ion battery Working Current 500mA Packing List 1 x Earphones 1 x Microphone (20cm) 1 x 100~240V 2-flat-pin plug charger 1 x USB cable (56cm) 1 x Fixed accessory 2 x Install screws 1 x English manual