Open hear-through sound allows listeners to stay connected to surroundings Oxygen-free copper voice coils improve signal transmission and conduction for cleaner, clearer sound Computer-optimized neodymium iron boron magnet structures deliver great sound quality and volume Includes straight, dual-entry 4 foot cord; straight, gold-flashed 3.5 mm (1/8-inch) plug and protective carrying case Limited Lifetime Warranty The Koss KSC35 ear clip headphones deliver outstanding sound quality at home or on the move. The ear clip headphones feature pivoting ear plates with soft foam ear cushions that guarantee an open hear-through sound and let you stay connected to your surroundings Active headphones for the active listener, the Koss KSC35s feature dynamic elements for an exceptionally wide frequency response of 15-25,000 Hz. You’ll revel in the high fidelity sound quality they offer, and love the superior volume – even with low-voltage portable devices. The perfect convenience for travelling music lovers, KSC35 earclip headphones come equipped with a protective carrying case for when you need to grab them and go.