Specification = Rated Input Power : 0.02w Maximum Input Power : 0.03w Impedance : 21 15% ohm Sensitivity : 118 3db CHannel Balance : 5 db Phase : Same Phase Driver : 50mm Interface : 3.5mm Audio Cable Length : 2m Mic Frequency Range : 100-10khz Mic Type : OMNI Directional Mic Impedance : 2.2K Size : 230 x 180 x 100 mm