The BT4.1 headset is 270 degrees rotation and comfortable to wear. It can connect 2 devices simultaneously, providing handsfree calls for your safe driving. Features: Long-lasting battery life, support handsfree calls for your safe driving. Connect 2 devices simultaneously. Streamline design, fit the headset in either left or right ear comfortably and securely. BT4.1 chip, 10 meters operating range. Compatible with most BT devices. 270 degrees rotation, comfortable to wear. Specifications: Material: ABS Color: Black BT Version: BT4.1 Transmission Distance: Barrier-free 10~15 meters Wireless Frequency: 2.402-2.480GHz Transmission Power: Class2 Play Time: 7-8h Battery Capacity: 110mAh Item Size: 60 * 57 * 22mm / 2.36 * 2.24 * 0.87in Package Weight: 60g / 2.12ounces Package Size: 94 * 73 * 30mm / 3.7 * 2.87 * 1.18in Packing List: 1 * BT Headset 2 * Ear Caps 1 * USB Cable 1 * User Manual