EP0337R Features 3.5 mm in-ear style earphone Allows you to conveniently enjoy calls and music Equipped with a microphone， volume control and hands-free button Compatible with all digital devices containing a 3.5mm audio port General Specs Brand & Model Bidenuo Z290i   Type In-ear earphone Microphone Yes Drive Units 15 mm Sensitivity 118dB±3dB Impedance 32ohm Frequency Response 20-20000Hz Microphone Sensitivity -42dB±3dB Plug Standard 3.5 mm  Cable Length 1.2 m Compatibilities iPhone 5， iPod Touch 5， iPod Nano 7， iPhone 4/4S， iPad 4， HTC and other devices with 3.5mm audio port Package Details Weight: 46.01 g Size: 17.5*9.5*3 cm Package Includes * Earphone