Hydrometers; Loudspeakers; Timers; Electric batteries; Electric door bells; Electric locks; Electric sockets; Electronic detectors for observing and measuring the infrared spectrum, namely, infrared detectors; Eye glasses; Fire alarms; Food safety monitoring devices, namely, thermometers, alarms; Gas detectors for detecting the presence of gas; Gas flow monitors; GPS tracking devices; Infrared cameras; Motion detectors; Mouse mats