Headphones; Intercoms; Gun scopes; Karaoke machines; Kitchen timers; Signal conditioning and communication devices for industrial process control; Signal generators; Signal mirrors; Signal processors; Signal processors for audio speakers; Signal splitters for electronic apparatus; Signal whistles; Signalling buoys; Signalling whistles; Signs, luminous; Sunglasses for pets; Vehicle batteries; Wireless indoor and outdoor speakers; Wireless microphones with integrated speakers; Zoom microscopes