Erorex BT-E20, ENC Wireless Neckband Earphones Bluetooth 5.1 High-Quality Reproduction Sound

Model No: BT-E20 ENCFlexible & LightweightBluetooth Version: 5.1High-Quality Reproduction SoundBattery capacity: 280 mAh (3.7V)Bluetooth Transmission Range: 10mTalk Time: About 22 hoursMusic Time: About 20hoursCharge Time: About 1 hoursCharging Interface : Micro PinStandby Time: 30 DaysMulti-function with three buttons & built-in Microphonehands free volume control with music and calls