USB Hi-Fi Headphones with Microphone provides high-quality stereo sound, a microphone designed to support voice clarity, & best-in-class comfort features. Supporting Common Core learning standards, these headphones provide a maximum output of 94 decibels for safe listening, & the mic supports the latest audio-based classroom testing requirements. Noise-canceling microphone uses passive-resistance technology to filter out ambient noise for optimum speech clarity. Powerful, 40mm drivers with deep bass & a wide dynamic range deliver an exceptional listening experience. Headphones are suitable for students, call centers, business professionals & recreational gamers. Designed to fit heads of all ages, the adjustable headband is padded. Flexible, boom-style microphone can be rotated up to 270 degrees. Foam ear pads are wrapped in a soft leatherette cover to provide hours of comfortable use. They are compatible with Windows, Mac & Chromebook for a simple plug-and-play experience.