Sentry Flat-Folding Stereo Headphones with a built-in microphone and metal cords are ideal to use with tablets, iPad, laptops, smartphones, iPhone, iPod, MP3, computers, games and more. The 40mm dynamic drivers deliver premium digital stereo sound and rich deep bass. The headphones, with metal cords have a built-in hands free two-line microphone; click once to play/pause music and answer calls; click twice to fast forward to the next song; and, click three times to skip a previous song. Go hands free with the two-line mic design, made to listen to music and answer phone calls without having to touch a cell phone. The adjustable fitting padded headband with soft on-the-ear pads folds up for easy travel.