Yunsailing 20 Pack Bulk Classroom Headphones Students Wired School Class Set Headphones for School Library Computer Office Adults 3.5 Jack Universal Plug

["20 Pcs Headphones Bulk: you will receive 20 packs of black headphones bulk, sufficient to use as set of headphones to meet demand; Reliable, functional set headphones with Headphones are becoming increasingly important in today's technology enhanced classrooms, headphones are not disposable earphones, which can be applied repeatedly for a long time","Reliable Design: headsets are made of ABS shell, the headphone cable is made of PVC, approx. 1.5 meter/4.92 ft long, not easy to corrode; Featuring a lightweight design with cushioned ear pads and adjustable headband to fit most head sizes, our earphones are designed with unilateral outlet, which is very convenient for the daily use and storage of earphones","Comfortable Experience: our headsets have a comfortable lightweight design with cushioned ear pads and adjustable headband, you can comfortably wear your fresh over ear headsets for hours or end without feeling the slightest discomfort","Adjustable Ear Headphone: our ear headphones bulk feature a flexible headband design that supports adjustment to fit a variety of head sizes, fits most people, and is also an ideal gift for party events or festivals; Suitable for people aged 14 and above","Good Compatibility: universal headphone plug are with 3.5 mm jack devices, which are compatible with the majority of audio devices such as tablets, phones, desktops, laptops or MP3 players, fitness equipment and other smart devices"]