EP0324B Features Deep and calm sound quality with rich layers Noise-isolation function makes the bass sound quality more excellent 3 sizes of soft silicone ear pads are rain & sweat resistant Built-in microphone General Specs Brand JBM Model MJ710 Sound Excellent super bass sound Earphone Type Wired in-ear headphone Impedance  16 ohms at 1kHz Sensitivity 102db Frequency Response 20-20000Hz Connector 3.5 mm audio jack Cable Length 1.2 m Dirver 9 mm Compatibility MP3 player， MP4 player， personal CD player， PC， laptop Others Microphone  Package Details Weight: 151.94 g Size: 17.5*11.5*3 cm Package Includes * Earphones * Bag of Ear Adapters