IPLOO overhead headphone Mic dimensions:+¼6x5mm Sensitivity:-40dbf+3db Lmpedance :f-2.2k±+ Driver diameter:+¼40.0mm Lmpedance :32±+ Frequency response:20~20khz Sensitivity(s.P.L):110.0dbf+3db(at 1khz) Input plug diameter:+¼3.5mm Cord length:2.5meters