Nowsonic Prinz, dynamic studio headphones, circum-aural closed headphones, self-adjusting headband for optimum fit, driver unit: 40 mm, impedance: 40 ohms, +/- 15%, sensitivity: 100 dB, +/- 3 db, frequency response: 10 Hz to 22000Hz, color: black, in the box: curve pu cable - 4mm diameter x 970mm length (before extension), textile cable - 4mm diameter x 3m length, cable w. microphone in line - 3mm diameter x 1.2m length, case with zipper, weight: 295 g