frequency range: 16Hz-28kHz, circumaural design, self-adjusting headband and auto-shut-off feature, single side jack, 55ohms rated impedance, 104dB/V sensitivity, 5mtr coiled cable with 3.5mm stereo mini-jack plug, 200mW maximum input power, 1 pair of velvet pads and gold plated 1/8" to 1/4" screw-on adapter, Includes 3mtr cable with 3.5mm stereo mini-jack plug, Weight: 240g (without cable)