Experience True Wireless Comfort and Astonishing Sound Quality on the Go with the Best over Ear and Cordless Bluetooth Headset. It has 33 ft of wireless, 4.0 Bluetooth connectivity built in for hands free calling. This multi functional headset uses a powerful integrated 340mAh rechargeable lithium battery with continuous music playback of 8 hours. In addition you also have a USB charging cable and 3.5 mm audio cable. With just a touch you can power the headset, adjust the volume and switch the tracks.