Features: 1. Utilizes the latest CSR4.0andEDR Bluetooth technology, super strong signal transmission, ultra-low power consumption, and expenditure of all Bluetooth devices; 2. support for automatic answer function, can switch to manually answer the phone function, safe and fast, built-in high-quality anti-interference microphone, can effectively realize the hands-free answer, hang up the phone; 3. high sound fidelity, the function can be operated up and down song, volume up and down, play pause, automatic callback, and other functions, simple operation. Specification: Connection Name: BT Bluetooth Version: V4.2andCSR (update, slightly different from the manual) Transmission Distance: 10M (transmission distance varies due to environmental factors and mobile phone Bluetooth devices) Bluetooth Pairing Distance: 20-30 Meters (depending on the device) Standby: 120 hours Play Time: 15 hours Charging Time: <=1 hour. Lithium Battery: 3.7V/500mA MIC Distance: u2264 1 meter Frequency: 2402 Ghz-2480 Ghz. MIC Distance: 1 Meter Feature 1: Helmet Headset Bluetooth Feature 2: Helmet Headset Motorcycle Bluetooth Feature 3: Helmet Headset Motorcycle Feature 4: Motorcycle Headset Helmet Feature 5: Motorcycle Headset Bluetooth Feature 6: Motor Headset Bluetooth Feature 7: Helmet Motor Headset Feature 8: Helmet Motor Bluetooth Headset Feature 9: Headset for Helmet Feature 10: Headset Motorcycle Helmet Package Includes: 1 x Motorcycle Helmet Headset 1 x Cable 1 x Manual 1 x mic cover 2 x static stickers