ES41 Clear sound TWS wireless headset with mic, BT V5.0, 40mAh headset battery for 5 hours of calls and music and 200 hours of standby, with 400mAh charging case1. BT version: 5.0, chip: JL6936D.2. Battery capacity: charging case 400mAh, single headset 40mAh.3. Calls / music time: 5 hours. Standby time 200 hours.4. Charging time: headset – 1 hour, charging case – 2.5 hours.5. Total weight: 37g. Single headset: 4g.6. Support “Leader” / “Follower” switching, graphene high fidelity moving coil unit, enjoy music!