Everything you need for classroom audio for up to 6 students at a time - just add an audio source! Constructed of heavy gauge plastic, this jackbox features a 4 foot long connection cable with dual source plug for a 1/4 inch or 1/8 inch jack, making it compatible with a wide range of media players! Paired with our robust SC-7V stereo headphones,your students will get the most out of their high tech lessons. The noise-isolating, closed-back design of this unit provides a superior learning environment. And now the SC-7V features our unique Dura-Cord™ – the chew, kink and knot-resistant, PVC-jacketed, braided cord – specially-designed to be more durable and reliable than ever!