AKG K-171 MKII Studio – dynamic stereo headphones with closed back, supra-aural design, 55ohm rated impedance, 200mW maximum input power, frequency range: 18Hz-26kHz, 107dB/V sensitivity, self-adjusting headband, 3m cable with 3.5mm stereo mini-jack, includes 1 pair of velvet pads plus 1/8" to 1/4" gold-plated screw-on adapter, ideal for monitoring and broadcast use. Weight: 200g (excluding cab).