B-Stock, Austrian Audio Hi-X50; closed studio headphones; On-Ear Headphones; all metal hinges and bow for maximum durability; foldable for easy transport; frequency range: 5 Hz to 28 kHz; sensitivity: 118 dB SPL/V; THD (@ 1kHz): <0.1%; Impedance: 25 Ohms; Input Power: 150 mW; Detachable cable 3 m; Connector: 3.5 mm including adapter to 6.3 mm; Dimensions: 300 x 170 x 85 mm; Weight (without cable): 0.28 kg, B-Stock with full warranty, may have traces of use