The closed-back HD 25-1 II Headphones are purpose-designed, professional monitoring headphones offering high attenuation of background noise. Capable of handling very high sound pressure levels and of extremely robust construction, these Sennheiser headphones perform exceptionally well in potentially high-noise environments such as field recording, electronic journalism sound reinforcement, studio monitoring and audio equipment testing. The capsule can be rotated for one-ear listening. Ideal monitoring headphones for cameramen and DJs.