The BT4.1 headset is 270 degrees rotation and comfortable to wear. Features:270 degrees rotation, left and right ears can be worn.BT4.1 chip, wireless transmission, no wire, no winding. Easy to control volume, switch, music play/pause, SMS broadcast, etc.Specifications:Material: ABSColor: BlackBT Version: BT4.1Transmission Distance: Barrier-free 10~15 metersWireless