BT12 function: Using the latest Bluetooth CSR4.2 + EDR technology, excellent signal transmission, ultra-low power consumption, all Bluetooth devices, automatic answer function, manual answer function with the ability to switch the phone, safe and fast answer. The built-in high-quality anti-jamming microphone allows you to answer and hang up loud calls. High fidelity sound, support last song or next song function, volume addition and subtraction, play pause, automatic call back and other functions, easy to operate. Product parameters: 1 Bluetooth version: V4.2 + EDR 2. Standby: 120 hours 3. Transmission distance: 10M (transmission distance varies depending on environmental factors and mobile phone Bluetooth devices) 4. Microphone distance: ≤ 1 meter 5. Lithium battery: 500Mah Package includes: 1 set of motorcycle bluetooth headset Notice: This is only a helmet headset, but the sound quality is clear, no intercom, if you mind, please do not buy it, thanks for your understanding! 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. Sold by-Minnanxin