1. Bluetooth version: 5.1
2. Chipset: Jerry 6983
3. Product color: black and white
4. Battery capacity: headset 35mAh, charging compartment 200mAh
5. Speaker specifications: F10 brass ring speaker
6. Transmission distance: ≤10 meters
7. Listening time: about 4 hours
8. Charging time: 1 hour
9. 100PCS/CTN