Features: Adjustable student headphones bulk classroom are lightweight, easy to carry, provide clear sound and come with soft ear pads for a comfortable fit, which can block outside noise to a certain degree, reduce tiredness on planes, trains. Class sets of headphones for students are reliable and practical, each kids headphone individually packaged school headphone for classrooms, planes, hospitals, students, children and adults. Specifications: Material: ABS, PVC, PU leather Color: as shown Headphone size: approx. 15 x 18 x 3 cm/ 5.91 x 7.09 x 1.18 inches Headphone cable size: approx. 1.2 meter/ 3.94 ft in length Package includes: 18 x Headphones in bulk Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays.