Califone - Switchable Stereo/Mono Headphone, with 3.5mm plug and 1/4" adapter

The Switchable Stereo/Mono Headphones are considered the benchmark headphone by schools and districts for language learning because of its sound quality, durability, and performance at an economical price to stretch budgets. The headphones help students better stay on task by muffling external distractions with its circumaural (literally meaning around the ears) ambient noise-reducing earcups.