ES33 Mirth sports wireless earphones BT V5.0 95mAh battery for 8 hours of music and calls and 200 hours of standby1. BT specification: BT V5.0 JL6936D.2. Support protocols: Headset, Hands-free, A2DP, AVRCP.3. Charging voltage: DC5V. Charging time: about 1.5 hours.4. Battery capacity: 95mAh. Size: cable length 82cm. Weight: 40g.5. Call / music time: 8 hours. Standby time: 200 hours.