The Hamilton Buhl LCB/12/MS2LV Lab Pack- 12 Pack of Hamilton MS2LV Personal Headphones with Volume Control and Leatherette Ear Cushions. This lab pack comes in a laminated cardboard carry case. Lab Pack Includes:(12) MS2LV Personal Headphones with Volume Control and Leatherette Ear Cushions(1) LCB5176 Laminated Cardboard Carry CaseCompatible with:MP3 PlayersCell Phones / Mobile DevicesTablets / eReadersComputers (Mac & PC)CD Players / StereosTVsMost Gaming SystemsPrevent The Spread of Lice: Built with kid's health and safety in mind, these headphones are designed to combat the spread of head lice in schools. Each headphone comes in its own heavy-duty, write-on, moisture-resistant, reclosable bag. When sealed in the bag, lice are killed in 24-48 hours, without the use of chemicals.