Features. Adjustable headband comfortable for extended wear. Specifically sized for young students. Ideal for beginning computer classes and story-time uses. Permanently attached with reinforced -"strain-" connection resists accidental pull out. Lengthy 5 Ft.-6 in. straight cord with 3.5 mm. plug set at right angle reduces accidental pull-out. Around-ear ambient noise-reducing earcups deliver maximum protection against exterior sounds ( without added electronic circuitry and expense). This reduces the need to increase the volume ( protecting the ears) and helps keep students on task. Rugged ABSplastic earcups resist breakage in high-use situations. Replaceable leatherette ear cushions. iOS, Windows, Android compatible Specification. Color - Black. Cone - 30 mm. Mylar. Magnet Ferrite. Impedance 25 Ohms each side/-15 Percent. Frequency Response 20 - 20KHz. SPL 110 db/- 3db. R/L output difference 3 db. Rating Input min 20mw, max 30mw. Distortion 5 Percent. Transducers 40 mm. Mylar dome driver unit. Sensitivity - 98dB 3dB at 1kHz. Volume Control - None for student protection. Plug - Right angle 3.5mm mini plug. Cord - 5.5 ft. straight cord. Headband Adjustable. Earcups Noise-reducing, ABS plastic for durability. Ear Cushions - Foam-filled leatherette. Weight - 9.6 ounces