The satin chrome Direct Sound Headphones Serenity Plus+ are over-ear headphones designed to deliver full-range frequency reproduction and effective noise isolation for travelers, musicians, and DJs in studios, transit, and mobile setups. Their 40mm drivers yield a frequency response of 20 Hz to 20 kHz. The over-ear design and cushioning provide 33.4 dB of passive noise isolation, making them ideal for use in high-noise environments such as airplanes and busy streets.A padded, adjustable headband offers enhanced comfort for short or long periods of use. The supplied, detachable 3' cable is terminated with a 3.5mm stereo mini-jack. The Serenity Plus+ are made in the USA and can be folded for simplified transport.