Sirens; Apparatus for recording, transmission, processing and reproduction of sound, images or data; Digital audio and video recorders and players; Electronic detectors for observing and measuring the infrared spectrum, namely, infrared detectors; Electronic pocket translators; Electronic warning bells; GPS tracking devices; Heat detection systems comprised of fiber optic linear loop configurations, heat detectors, monitors; Loudspeakers, headphones, microphones and CD players; Personal secur...