You deserve to have headphones that are truly yours, ones that know your ear and are calibrated to your exact needs. The H2 wireless headphones use EarPrint technology to adjust the levels to your specific profile. A short test ensures higher quality sound, and a uniquely satisfying experience. The wireless design works through Bluetooth, and can be charged via the included USB cable. A 20-hour battery life means you can listen all day without worrying about the tangle of cords, and the walnut ear caps add an element of unforgettable analog style.