Bluetooth version :Bluetooth V5.0+EDR; Transmission distance :10 meters 2. Use time :4 hours; Standby time :300 hours; Battery :200mAh rechargeable lithium battery
Charging time :1.5 hours
. Frequency response: 20HZ-20 KHz
Bluetooth 5.0, low latency, millisecond response
6. Long endurance, long standby
7. Simple keys, easy to operate
8. Stylish design, comfortable earmuffs, 
