Wireless dual ear design, left and right ear channel separation. You can use the headset solely, or used them in pairs. BT 5.0 brings high data transfer speed, stable connection and low power consumption., Auto power on and quick pairing between left and right earphone. Easy and quick to pair with BT-enabled audio devices. Effective distance is about 10 meters in open space., 40mAh battery in each earphone ensures about 4 hours of working time. Charge automatically in the 210mAh charge box which enables dual headsets charge for about 2 times. Supports up to 12 hours playing time in total.,