1. Bluetooth version: V5.0 binaural call 2. Working frequency: 20-2000Hz 3. Support: battery display, music call. 4. Headphone battery capacity: 45mAh 5 charging box battery capacity: 300mAh 6.USB charging: the headset is full for 1 hour, and the charging compartment is full for 2 hours. 7. Headphone standby time: 180 hours, 8 .charging bins to charge the number of headphones: 3 times. 9. Continuous talk time: 2.5 hours - 3 hours, Music playback: 2.5 hours - 3 hours