IP4189W Features Hi-Fi stereo headphone Convenient 1.2 meter flat cable Universal 3.5mm plug General Specs Brand & Model OVLENG X2  Sound Hi-Fi stereo sound Earphone Type Wired headphone Microphone N/A Volume Control N/A Speaker Diameter 40 mm Impedance  32Ω Frequency Response 20Hz-20KHz Input Power Maximum 100mW Connector 3.5 mm audio jack Cable Length 1.2 m Sensitivity 102dB SPL at 1KHz Compatibility Cell phones， MP3/MP4 players， iPhone and other audio devices with a 3.5mm audio jack Package Details Weight: 241.82 g Size: 18.8*18*6.5 cm