Superlux HD-681, Studio Headphones, Semi-open, Circumaural (full size), Dynamic, Self-adjusting headband, Peak SPL: 98 dB, Impedance: 32 Ohm, Frequency Range: 10 - 30000 Hz, Maximum Power: 300 mW, THD 100 mW@1KHZ<1%, 2.5m Cable with 3.5 mm Stereo mini-jack, Weight (including cable): 278 g, Weight (excluding cable): 230 g, Including 6.3 mm mini-jack adapter and a bag