Webcams; Burglar alarms; Computer network hubs; Computer peripheral equipment; Connections, electric; Day and night vision systems primarily comprised of day and night sensors, day and night cameras, and monitors; DC/AC power converters; Digital video recorders; Electric transformers; Electrical terminal blocks; Electronic cables; Electronic displays, namely, digital signage; Headwall gas and electricity distribution units comprising power strips, surge protectors or electrical power distribution apparatus for use in hospital facilities; High-frequency switching power supplies; Power strips; Sirens for vehicles; Step-up transformers; Telecommunications equipment, namely, fiber-optic transceivers, fiber optic repeaters, converters and optimizers, wave division multiplexers, free-space optics transmission systems, switches including Ethernet switches and routers, fiber-to-the-home and ethernet-over-VDSL access aggregators, terminators and repeaters, and remote presence management products, namely, switches, and console, alarm, sensor and power management devices; Voltage stabilizing power supply; Voltage testers