Description d new high quality. Compact size light weight, easy to carry. Built-in large capacity 500mA rechargeable battery, CSR8635 imported UK chips. Latest 4.1EDR Bluetooth technology, superior signal transmission, ultra-low power consumption, compatible with iPhone roid devices. (Press the power button once to answer the call. Press the button again to hang up.) Built-in high-quality anti-interference microphone, external windproof sponge, can effectively answer hs-free, hang up the phone, high fidelity. Support up down music, add subtract volume tones, playback pause , automatic callback other functions, easy to use, easy to use. Built-in mini USB charging interface for quick easy charging. Built-in large capacity lithium battery, multi-circuit protection, long stby nd working time. Toner reminder function, easily set the machine according to the toner reminder. Auto repair with memory function. (If your device is the last paired device, the headset will be automatically re-paired with your device when the device re-opens it.) Excellent performance for full-face helmet/half-face helmet, off-road helmet, flip-up helmet, etc. Specification : Material: Plastic Color: Black Bluetooth Name: BT12 Bluetooth Version: 4.1 EDR Support: Stereo Music (A2DP) Frequency: 2.402GHz - 2.480GHz Transmission range: 20-30 meters (depending on the device) Microphone transmission distance: 1 meter Playback time: 15 hours Stby time: 240 hours Charging time: about 3 hours Li-ion battery: 3.7V/500mA Charging voltage: 5V Waterproof rating: IP45 Interval between left right horn: Approx. 43cm Horn wire length: Approx. 17 cm Horn diameter: Approx. 4.1cm Net weight: 127g Note: 1.The helmet headset must be fully charged (about 2 hours) before the first use. 2. The LED indicator lights up et solid red while charging turns off when the battery is fully charged. 3. The earphone cannot play music or answer calls while charging. Package Included: 1x Helm Bluetooth Headset 1x USB Cable 1x User Manual 1pack Accessories