lights, emergency and exit lights, pool equipment including underwater lighting, motors, switches and outlets, fuse boxes, circuit breakers, generators, intercoms and bells, fire alarms, engines, generators, batteries, fans, sound systems, scoreboards, security cameras and systems, technology (computers, smartboards, projectors, screens, monitors), door security systems, and all classroom or office clocks. While performing the duties of this job, the employee is frequently required to drive a van, stand, walk, climb a tall ladder, use an aerial lift for very high places, use hands and fingers to grasp, handle, and feel small objects, tools, or controls; and talk or hear and to appropriately use personal protective equipment as required or deemed prudent throughout the course of performing duties.