Color Black Brand N/A Model O-com Quantity 1 Piece Material ABS Type Interphone Application OthersHelmet Transmt Distance 10 m Tuner Bands N/A Output Frequency Range 85~108 GHz Intercom Function Yes Intercom Effective Distance 500 m Talk Time 7 Hour Standby Time 100 Hour Speaker Power 0.25 W Remote Control Distance N/A cm Power Supply AC100~240V Working Current 0.2 A Waterproof Function Yes Interface 1 x mini USB Expansion Card Capacity (Max.) Not supported Installation Method Install the clip on the left side of the helmet; fix the BIM on to the clip. Other Features 500m connecting distance for two riders; daily water resistant; auto change between phone call and intercom; it can pair with cellphone GPS and other stereo devices at the same time; supports monitoring phone calls on it redial last contacted number; can play audio files from GPS SBC MP3. With play / pause next / previous stop key; good echo / noise delimination. How to use: connect the earphone to the intercom and press the power switch till red / blue LED flashes; click the power button on either one of the earphone to activate pairing (blue LED flashes) Packing List 1 x Bluetooth receiver 1 x Speaker / microphone (50cm) 1 x Mini USB cable (100cm) 4 x Velcro tapes 2 x Fasteners 1 x Screwdriver 1 x 100~240V US plug charger