Digital music downloadable from the internet; computer software for processing digital music files; navigational instruments; loudspeakers; subwoofers; televisions; set-top boxes; smart speakers; webcams; audio equipment; virtual reality goggles; alarms; buzzers; smoke detectors; electric switches; electrical outlets; remote controls; computer terminals; video monitors; computer software; audio mixers; audio receivers; sound processors; speakerphones; network routers; wireless routers; satellite dishes; satellite receivers; sound projectors; burglar alarms; security alarms; theft alarms; dimmer switches; light dimmers; eyewear; spectacles; sunglasses; computer application software for mobile phones; computer application software for mobile telephones; downloadable applications for use with mobile devices; software and applications for mobile devices; software applications for use with mobile devices; call barring devices for use with telecommunications apparatus; communication devices; communication devices for linking computer networks; communications devices; electrical devices for communication by facsimile; electronic devices used to locate lost articles employing the global positioning system or cellular communication networks; microphones for communication devices; personal communication devices; receiving devices for connection to communication networks; telecommunications devices; underwater communications devices; electric buzzers; electronic buzzers; wireless queue buzzers