Wallytech New Metal Earphone with Flat Cable and a 8mm driver for SUPER BASS, Compatible with all iPhone, iPod, MP3, DVD, computer and CD players, will work with all listening devices with a 3.5mm stereo plug : model (Wea-110), EXCELLENT SOUND, YOU WILL BE AMAZED. 8 mm Driver with a Frequency Response of :20HZ~220kHz Impedance:16ohms, Sensitivity:108dB, Cord Length:1.20m Cord length: flat cable 1.2m with a Input plug: 3.5mm stereo plug Compatibility: all iPhone, iPod, MP3, DVD, computer and CD players Flat Cable Metal Earphones, 8mm, with Super Bass Speaker