EP0288B Features Gold plated plug Wired control microphone Aluminum ear pads won't heat even after long time working Supports iPhone and tablet PC General Specs Brand AWEI Model ES800M Sound Excellent Hi-Fi sound Earphone Type Wired headset Sensitivity 116+/-3dB(1000Hz， 0.5Vrms)  Impedance  16 ohms Frequency Response 18Hz-20000Hz Driver Diameter 11 mm Connector 3.5 mm audio jack Cable Length 1.5 m Compatibility iPhone 4， iPhone 3G， iPhone 4S