1. Driver: 15mm
2. Impedance: 32 OHM
3. Bluetooth version: v5.0+EDR
4. Bluetooth use frequency band: 2.4GHz
5. Power level: CLASS II
6. Output power: 30mW
7. Bluetooth distance: 10 meters without barriers
8. Frequency response: 20-20000Hz
9. Operating voltage range: 3.0V-5.0V
10. Microphone sensitivity: -42dB

11. The net weight of the product is about 70g

.Talk time about 4 hours
.Music time is about 4 hours
.Standby time is about 120 hours
.Charging time is about 40 minutes
.Battery capacity 35MAH (charge storage 350MAH)

  21. Charging power supply: DC5V power supply [round hole interface] (computer USB port, mobile phone charger, car charger)

Single product weight: 35.6g
Weight with box: 66g
Accessories: manual + data cable + ear cap