Foldable Headband for Easy Storage. Swivel Earcups for Single Sided Listening. Excellent Listening Comfort. Exceptionally Clear Sound QualityThe HP-20 headphones feature high quality semi closed ear- dynamic stereo powered by lightweight neodymium ferrous rare earth magnet system with lightweight copper clad aluminium voice coils. The adjustable frame allows for a comfortable fit and hours of wearing without fatigue. The coiled cable is gold plated mini stereo 3.5mm jack with a 1/4″ jack adapter.. Response: 20Hz-20kHz Sensitivity: 105db Impedance: 32 Ohms Power Handling: 20mW Weight: 111g
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