Professional Studio Monitor Headphones, Closed-back dynamic, Driver Diameter: 40mm Neo, Frequency Response: 15 - 20,000 Hz, Max Input Power: 700 mW at 1 kHz, Sensitivity: 96 dB, Impedance: 47 ohms, Weight 190g, Cable 3.0 m, left-side exit, Acc. Included 6.3 mm (1/4') snap-on adapter