With a lightweight honeycomb aluminum casing, these open-air headphones produce no sense of pressure on the ears, offering a completely natural listening experience. Newly designed 53mm drivers with bobbin-wound CCAW voice coils deliver spacious sound with superior highs and mids. The selfadjusting wing support automatically adjusts to your head size for easy-wearing listening comfort. A straight cord at the left earpiece terminates to a mini plug with included ¼» adapter. Newly designed 53 mm drivers reproduce clear treble and midrange Bobbin-wound CCAW voice coils for superior power handling Full open-air type headphones produce no sense of pressure on the ears, resulting in a completely natural sensation Lightweight aluminum honeycomb casing with excellent acoustic properties Driver Diameter: 53 mm Maximum Input Power: 700 mW Frequency Response: 5 - 30,000 Hz Sensitivity: 100dB/mW Impedance: 48 ohms Weight: 265 g Connector: 3.5 mm(1/8”) mini stereo, gold-plated Cable: 3.0 m (9.8’) Accessories Included: Detachable 1/4” (6.3 mm) adapter