Features: Using the latest CSR4.2+EDR Bluetooth technology, superior signal transmission, ultra-low power consumption, all Bluetooth devices, automatic answering function, switchable manual answering phone function, safe and fast, built-in high-quality anti-interference microphone It can effectively realize hands-free answering and hang up calls. High fidelity sound, support last song or next song function, volume addition and subtraction, playback pause, automatic callback, and other functions, easy to operate. Product Parameters: 1. Bluetooth version: V4.2+EDR 2. Standby: 120Hours 3. Transmission distance: 10M (transmission distance varies depending on environmental factors and mobile phone Bluetooth devices) 4. MIC distance: ≤ 1 meter 5. Lithium battery: 500mA Notice: This is only a helmet headset, but the sound quality is clear, not an intercom, if you mind, please don't buy it, thank you for your understanding! Packages: 1*Helmet Headset 1*Integrated Full Helmet Microphone 1*USB Charging Cable 1*User Manual 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.