This premium dynamic high definition stereo earphone has an ultra lightweight, unique water drop shaped body. This unique design delivers you not only the design but also the sound of pleasure. The silicon ear tips fit smoothly inside your ears, allowing you to enjoy your music while reducing unnecessary noise around you. Specifications Type : Closed, Dynamic Driver Units : Ø8.8 mm Impedance : 16 ? Sensitivity : 90 dB/mWMax. Input Power: 40 mW Frequency Response : 20 ~ 20,000 Hz Cord Length : 1.2 m Plug : 3.5 mm stereo gold-plated plug Weight : 3.5 g (Except cord)