The Shure SRH240A headphones provide excellent sound reproduction, optimized for general listening and monitoring. With 40 mm neodymium dynamic drivers, the SRH240A Headphones reproduce full bass with clear mids and highs. Impedance, power handling and sensitivity are all calibrated for connection to most consumer and professional audio devices. And with an ergonomic, circumaural design, it fits comfortably for all-day use.