Product Details feature 1. This helmet bluetooth headset is carefully designed by the designer according to the internal structure of the motorcycle helmet full helmet and half helmet. Adopt the latest 5.0 Bluetooth technology, super signal transmission, ultra-low power consumption, support all Bluetooth devices. With the function of automatic answering, there is no need to answer the call manually, which is safe and fast. 2. Support functions such as song up and down, volume increase and decrease, playback pause, automatic call back, etc. The operation is simple and easy to use. 3. Applicable to European and American environmental safety regulations such as CE, RoHS, and FCC. Product parameters: 1. Bluetooth version: 5.0andEDR 2. Frequency range: 2.4026GHz-2.480GHz 3. Transmission distance: 10M (transmission distance varies due to environmental factors and mobile phone Bluetooth devices) 4.MIC distance: 1 meter 5. Lithium battery: 3.7V or 500mA 6. Charging time: 4-5 hours 7. Standby time: about 180 hours 8. Continuous working time: about 20 hours 9. Bluetooth name: BT12 Size: 50X35X12 (mm) Weight: 192g Material: plastic Colour: Black Quantity: 1 box Package includes: 1xHelmet headset 1xUSB charging cable 1xInstruction manual 2x Velcro rough surface 2xVelcro hook surface Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.