TWS wireless bluetooth headset TWS Sports Headphones and playback device connection:

Headphones and playback device connection: Bluetooth connection

both ears can be used separately

Glass: mineral reinforced glass

How to use: earplug style

Case material: Alloy

TWS wireless bluetooth headset TWS Sports Headphones and playback device connection:Communication distance: about 20 meters (in barrier free environment) Bluetooth version: V5. 0+EDR Working hours: about 3 hours Standby time: about 60 hours Charging time: about 1 hour Battery type: Polymer lithium ion battery Headset battery capacity: 3. 7V 50mah Headphone Battery Capacity: 3. 7V 50mah Charging time: about 1 hour Engine room battery capacity: 3. 7V 2000mah Charging time: about 4 hours