Head-mounted sports running ears retractable computer gaming headset

Bluetooth version: BLUETOOTH V5.0+EDR
Active noise reduction: 15 ~ 20 decibels
Transmission distance: 10 meters
Frequency response: 20HZ-20 KHZ
Usage time: 4 hours
Rated power: 15MWX2
Standby time: 300 hours
Music playing time: 4H
Battery: 250 MAH rechargeable lithium battery
Charging time: 2 hours

Speaker: 40 cm steel magnet