Good Compatibility: each stereo school headphone has a 4 feet long audio cable and a 3.5 mm audio connector, which are compatible with majority of audio devices such as tablets, phones, desktops, laptops or MP3 players, fitness equipment and other smart devices
Wide Applications: you will get 48 packs of 3.5 mm over the head wired headphones in black color, simple and classic style, and there are sufficient quantity to meet the application and replacement for schools, classrooms, airplanes, hospitals, libraries, gyms, fitness centers, hotels, travel and more