WK Bluetooth Headphones Youpin Series TWS V3 White Automatic pairing, connecting when opening the pop-up window Touch control operation, call and listen to the songBluetooth Version: V5.1 Material: ABS+PC+Silicone Earphone: 2*30mAh Charging: 1 hour Play: about 4 hours Charging box: 200mAh Standby time: 60 days 13mm moving coil sound quality