Headphones; Earphone; Wireless headsets for smartphones; wireless loudspeakers; Cameras; Portable media players; Camcorders; Global Positioning System apparatus; Bags for photographic apparatus; Electronic pens; Telescopes; divers' masks; Periscopes; Pince-nez; 3D spectacles; Slide projectors; Video baby monitors; Electric door bells; electronic collars to train animals; Battery chargers