Bluetooth 5.3
2. Battery Capacity: 180mAh
3. Charging Time: About 2 hours
4. Use Time: 50 hours
5. Standby Time: 20 Days
6. Supports Chinese and English prompt tones; double-click the multi-function key in unpaired state
7. 180mAh large battery provides 50 hours of battery life, with fast charging in just 2 hours