Wireless communications technicians install, maintain and repair cellular communications equipment, such as cellular phones and transmission equipment. Electrical and electronics engineering technicians help design, develop, test, and manufacture electrical and electronic equipment such as radios, radar, sonar, television, industrial and medical measuring or control devices, navigational equipment, and computers. They may work in product evaluation and testing, using measuring and diagnostic devices to adjust, test, and repair equipment. Electrical and electronics engineers design, develop, test, and supervise the manufacture of electrical and electronic equipment. Electrical equipment includes power generating and transmission equipment used by electric utilities, and electric motors, machinery controls, and lighting and wiring in buildings, automobiles, and aircraft.
Electronic equipment includes radar, computer hardware, and communications and video equipment.
However, some, such as commercial and industrial electronic equipment repairers, may be exposed to heat, grease, and noise on factory floors. Some may occasionally have to work in cramped spaces. Telephone installers and repairers may work on rooftops, ladders, and telephone poles. Good eyesight and color vision are needed to inspect and work on small, delicate parts and good hearing to detect malfunctions revealed by sound. Because field repairers usually handle jobs alone, they must be able to work without close supervision.