NAME Monolith by Monoprice M570 Over Ear Open Back Planar Headphone SPECS Model 39256 Style Open back over ear Transducer Type Planar magnetic Magnetic Structure Linear symmetry magnets Magnet Type Planar Driver Size 97 x 76 mm Frequency Response 5Hz ~ 55kHz Sensitivity 96dB Impedance 32 ohms Headphone Cable Length 5.9 Feet Housing Zebrawood Weight 1.1 lbs (515g)