DROP TESTED RELIABILITY-tested tough for students-drop tested up to 6 feet and TECHSHELL Rugged Certified to ensure durability. ^^ OPTIMIZED AUDIO SIMPLICITY - full frequency response (2020, 000 Hz) delivers high-quality sound with easy plug-and-play use. ^^ CHEW PROOF CORD - braided, 5-foot-long, durable, chew-proof cable with a standard USB C headphone jack. ^^ FLEXIBLE HEADBAND DESIGN - twistable, adjustable, and break-resistant construction for a secure, long-lasting comfortable fit.