Featuring a swivel mechanism that allows the driver unit to turn 90 degrees to fit the angle of your ears, and a headband that allows smooth adjustment of its, HPH-50 headphones are designed to provide a comfortable, stress-free listening experience, hour after hour.SpecificationsDriver Type: Dynamic, closed backDriver Unit: F38 mmImpedance: 35 ohmsMaximum Input: 1,000 mwSound Pressure Level: 103 dBFrequency Response: 20 Hz – 20 kHzWeight: 133 g with cableCable Length: 2.0 mConnectors: 3.5 mm (1/8″) stereo, 6.3 mm (1/4″) stereo (with supplied adapter)