Cootree In-Ear Headphones Built in Mic Sport Earbuds Stereo Bass Earphones with Controller Silver COMFORTABLE-FIT: Lightweight sport design in-ear earphones Engineered for cosy usage, small earpiece style follows the natural shape of the ear to provide all-day comfort POWERFUL DEEP BASS: Magic bass with HD audio performance and precision response for your fantastic experience HIGH COMPABILITY: Compatible for iPhone / iPod / iPad, Android and Blackberry audio devices, with a standard 3.5 mm jack FLAT CORD: About long 3.9ft cable threads through clothing and bags,with 4 extra eraplug for you rportable usage