Acoustic sound alarms; Alarm bells, electric; Baby monitors; Cases for photographic apparatus; Ear plugs for divers; Electric door bells; Electric meters; Face masks for diving; Headphones; Horns for loudspeakers; Lens hoods; Portable video cameras with built-in videocassette recorders; Rearview cameras for vehicles; Security surveillance robots; Sirens; Teaching robots; Video cameras; Video recorders; Wearable video display monitors; Video baby monitors