Product parameters: Product Type: Blue tooth headset Wearing method: head-mounted Function use: wireless headset, voice headset Blue tooth version: V5.0 Power indicator: blue light Charging port: Mini 5-pin USB charging port Normal charging time: about 3 hours Talk time: up to 10 hours Product accessories: earphones, USB charging cable, manual Blue tooth version: Blue tooth V5.0 Transmission distance: 10 meters Use time: 6 hours Standby time: 5-8 minutes automatic shutdown Battery: 450mAh rechargeable lithium battery Functions: adjust volume, switch songs, answer calls, reject calls, hang up calls, Blue tooth playback, call replay, Blue tooth connection, voice prompts, battery display, FM, TF, EQ, pure English broadcast, one for two.