BT-S3 Motorcycle Helmet Bluetooth Headset Motorcycle Intercom Bluetooth Headset Parameter: 1. Bluetooth version: 3.0+EDR 2. Working frequency: 2.4GHz 3. Support Bluetooth protocol: A2DP, AVRCP 4. Support Bluetooth function: Bluetooth Headset and Hands free Profiles with Automatic Detection 5. Working range: about 10 meters (mobile phone) 6. Battery type: 450mAh rechargeable lithium battery 7. Standby time: less than 300 hours 8. Talk time: less than 10 hours (mobile phone) 9. Talk time: less than 8 hours (intercom mode) 10. Charging time: less than 3 hours Features: 1. Achieve direct full-duplex intercom between the Bluetooth helmet headset and the Bluetooth helmet headset 800-1000 meters 2. Can make and receive calls, reject calls and hang up 3. Automatically answer calls 4. Support FM radio function 5. Support voice switching 6. Use A2DP to enjoy music transferred from your mobile phone or connect to GPS 7. You can control the previous song, next song, play, and pause of mobile phone music through AVRCP 8. It can realize automatic switching between Bluetooth mobile phone calls, intercom calls, stereo music and FM radio 9. With DSP noise cancellation and wind sound processing, to ensure clear voice quality when using at high speed 10. The button panel is waterproof and sun-proof design, durable 11. Support last code redial 12. Connect MP3, GPS, mobile phone, walkie-talkie, etc. via audio cable