Moving-coil dynamic unidirectional element Durable zinc alloy metal construction Steel mesh grille On/off broadcasting switch Freq resp: 50Hz-15kHz Imp: 600ohm +/-30% Sensitivity: -54dB +/-3dB Dim: 6.7" H x 1.7" W x .3" D 6.5ft x 4.5mm microphone cable with 300ohm outputs