Transducer:50mm Dynamic, Closed cavityEar Coupling:Supra-auralFrequency Response:10-30,000 HzImpedance:32ΩSensitivity:98dB (+/-3dB @1mW)Rated Power:300mWMax Power:1800 mWPlug Type:3.5mm with 6.3mm (1/4″) adaptor includedCable Type:Straight and coiled options