Acoustic alarms; Alarms for the detection of inflammable gases; Anemometers; Carbon monoxide detectors; Clickers for training dogs; Digital multimeters; Digital pH meters; Distance measuring apparatus; Electronic sliding callipers; Fitted protective skins comprised of silicone for covering drive-thru communication headsets; Gas detectors for detecting the presence of gas; Headphones; Metal detectors; Surveying instruments; Timers