1. Bluetooth Version: Bluetooth V4.2
2. Transmission distance: 10 meters
3. Use time: 6-8 hours
4. Standby time: 4-6 minutes automatic shutdown
5. Battery: 70 mAh rechargeable lithium battery
6. Functions: adjusting volume, switching songs, answering calls,call rejection, hangup, bluetooth playback, telephone replay,broadcast, bluetooth return, voice tips, power display, inform the caller number, intelligent shutdown, plain English broadcast