B-Stock, Ultrasone Signature X headphones; over ear; closed back; dynamic; frequency range: 5 Hz - 32 kHz; impedance: 32 ohms; sound pressure level: 115 dB SPL; 50 mm Mylar driver with NdFeB magnets; cable detachable; single sided cable; S-Logic3 technology; low radiation LE-Standard; delivery content: Signature X, travel case, 2m coiled cable with 6,3mm stereo jack, 1,2m cable with 3,5mm stereo mini jack; weight (cable excluded): 275g., B-Stock with full warranty, may have slight traces of use