FeaturesMulti-device compatibilityStereo sound through powerful 40mm driversMaximum output to 94dBNoise cancelling, flexible boom-style microphonePadded ear pads & headband, and 1.8m USB cableThe Kensington USB HiFi Headphones with Microphone provide high-quality stereo sound, for an exceptional listening experience. Designed to fit heads of all ages, adjustable headband, with earpads covered in soft leatherette for comfort. Noise-cancelling microphone for optimum speech clarity.