Havit i66N Over-ear wireless headphone The headset comes with the EQ toggle button, which allows you to enjoy the bass freely and easily. Enhance the sound insulation, easy to isolate external noise, to create a perfect music enjoyment surroundings. Wireless headphone with 3.5mm AUX jack, can be used as wired headphone. Specifications: Bluetooth Version : 4.2 Wireless Range : 10M (without obstacles) Speaker Size : 40mm Battery : 3.7V 300mAh Charging Time : 3H Talk time : 5H Frequency : 20Hz -20KHz Size : 156x86x137 Weight : 175g What's in the box 1 x Headphone