Superb sound quality headset with wireless V4.2 for best stereo sound and superb bass sound, with built-in mic to easily take calls and for voice dialing. Built-in Lithium-polymer battery, makes you enjoy music or watching TV and films for a longer time. Larger wireless range make the mini headphones extraordinary, up to 30ft wireless range in the open space. Easy to use technology with voice notification of incoming calls and phone numbers.