Manufacturer's specifications here
High Fidelity Circumaural Stereo Headphone with in-line Volume Control. Perfect for use as an education headphone, airline headphone or just listening to your favorite tunes on your mobile device.
When sound intelligibility is a priority, the EDU-375 circumaural stereo headphone provides full size headphones that have oval ear pads that encompass your entire ears. These headphones completely surround the ear and are designed to fully seal against the head and to attenuate any intrusive external background noise. The large leather-type ear cushions are plush and provide maximum comfort. The extra wide dual rib headband is designed to provide a stable and comfortable fit, even for smaller heads.
-Large Circumaural ear cups with plush leather-type ear cushions for passive noise attenuation, providing enhanced listening intelligibility.
-40mm speakers with CD quality deep bass sound
-Dual band adjustable headband
-Inline volume control
-Extra long 8 foot cable
-Durable construction, cost effective headset solution
-Certified for safe use by children in accordance with the United States Consumer Product Safety Commission.