ORZ

[ Slide projectors; Slide projection apparatus; transparency projection apparatus; ] computer mouse; [ computer graphic boards; ] blank USB flash drives; [ Pedometers; chronographs for use as specialized time recording apparatuses; Smartphones; Mobile phone; Television cameras; ] Earphone; [ Megaphones; Loudspeakers; television; Horns for loudspeakers; ] Headphones; [ Portable media players; 3D spectacles; multimedia projectors for use in teaching; Smartglasses; Smartwatches; Earphones; ] Set-top boxes