Professional Studio Monitor Headphones, Closed-back dynamic, Driver Diameter: 45mm Neo, Frequency Response: 5 - 40,000 Hz, Max Input Power: 2 mW at 1 kHz, Sensitivity: 97 dB, Impedance: 35 ohms, Weight 280g, Cable. 1.2-3.0 m, Acc. Included 6.3 mm (1/4") screw on adapter