Specification: Driver Unit:16mm Frequency Range:20~18KHz Sensitivity:116dB(at 1KHz) Impedance:32ohm Rated Power: 4mW Max.Input Power:10mW Cable Length:1200mm Plug: ?3.5mm Gold weigth:13+/-3g(with cord) packing list : DESCRIPTION : MP3/MP4 earphone UNIT PACKAGE : Color Box PCS /CTN : 120 CTN SIZE(CM) : 51*32*33 G.W.(KGS) : 7.1