Specification: Style: in-ear Function: Noise cancelling Communication: Wired Connectors: 3.5MM Use: All kinds of Smartphone\/Tablet PC Audio player， etc. Cable Length: 1.2M Impedance: 32Ω Sensitivity: 104DB\/MW Frequency Range: 20~2000HZ  Package Included: 1 X  Remax RM-303 Stereo Earphone with Mic For Mobile Phone MP3 MP4  More Details: