The closed-back HD 25-1 II purpose-designed, professional monitoring headphones offer high attenuation of background noise. Capable of handling very high sound pressure levels and of extremely robust construction, these headphones perform exceptionally well in high-noise environments, such as sound reinforcement, studio monitoring, and audio equipment testing. The capsule is rotatable for one-ear listening. The Sennheiser HD-25 II make ideal monitoring headphones for cameramen and DJs.