The Learner LNR66T school headphone features shatterproof ABS earcups and a microphone on a flexible metal boom. Stereo 40mm drivers produce excellent sound. Designed for schools and daily classroom use, the Learner LRN66T features a popular legacy headset design with vinyl ear pads and slotted driver covers, improving hygiene and making cleaning easier. Adjustable headband makes it easy to size these headphones for small children up to adults. 4' cord with has a single 3.5mm plug (known as a TRRS plug) that works with iPads, tablets, laptops, smartphones, and other devices that use a single 3.5mm jack for both the audio and microphone (Some tablet and computer manufacturers call this a combo or combination port).