Adjustable studio, faux leather black headphones featuring the Liverpool crest, Speaker diameter 40mm, Frequency: 20-20000 Hz, Impedance: 32 ohm Sensitivity: 108 dB/mW /- 3dB, Max. communication range: 10m, Decoding range: MP3 8-320Kbps WMA 5-320Kbps WAV 16-1536Kbps, Approx 16cm in diameter, 20 cm in height, Each headphone is 8cm in diameter 10cm in height