The HD 205 provide an excellent sound quality & a brilliant shielding of ambient noise. The rotatable ear cup as well as the single-sided cable make them a professional companion even for DJs. The HD 205 come with a convenient protective pouch for storage & transportation. Features & Specifications: Medium-sized dynamic, supraaural headphones. For compact systems or mobile players (32 ohm.). Powerful stereo sound. Outstanding passive attenuation of ambient noise. Rotatable ear cup for one-ear listening. Highest wearing comfort for long music sessions. Comfortable head- & ear pads. Convenient protective pouch included. 3.5 mm. jack plug & 6.3 mm. screw-on jack adaptor, gold-plated. Single-sided cable. Nominal impedance 32 Ohm. Jack plug 3, 5/6, 3 mm. stereo. Transducer principle dynamic, closed. Ear coupling supraaural. Weight without cable: 206 g. Frequency response (headphones) 14.20000 Hz. Sound pressure level (SPL) 112 d B. (SPL). THD, total harmonic distortion < 0.5 %.