1. Material: ABS
2. Bluetooth 5.0, chip: BK 3266
3. Battery capacity: 140mAh, charging time is about 2 hours
4. Talk / music time: 6 hours
5. Standby time: 120 hours
6. Ear hook design, air conductive sound, open ear
7.Voice reminder switch: When not connected, double click the multifunction button and there will be be beep