AKG K-271 MKII, Studio Headphones, Semi-open, Circumaural, Dynamic, Nominal impedance: 55 Ohm, Nominal power capacity: 200 mW, Frequency range: 15 - 25,000 Hz, Peak SPL: 91 dB/V, Detachable cable, one-sided cable connector, Straight 3 m cable with 3.5 mm jack, 5 m coiled cable with 3.5 mm jack, Screw-in 6.3 mm jack adaptor, Weight with cable: 226 g, Weight without cable: 281g, Includes: One pair of Velour ear pads