IP2775R Features Superb sound quality Foldable design makes it covenient to carry Soft leather ear pads is comfortable for long time wearing General Specs Brand LANGSTON Sound Excellent stereo sound Earphone Type Wired headset Sensitivity 105 db Impedance  32 ohms Frequency Response 20Hz-20KHz Connector 3.5 mm audio jack Driver Diameter 40 mm Cable Length 47.5" Compatibility MP3 player， MP4 player， tablet PC， iPhone， iPad， iPod， Smartphone Package Details Weight: 221.49 g Size: 18.5*12.2*6.3 cm Package Includes * Headset