AC/DC converters; AC/DC inverters; AC/DC power supplies; Automatic transfer switches; Circuit breakers; Digital multimeters; Electric relays; Electronic frequency converters for high velocity electro motors; Electronic pens; Frequency converters; Laser range finders; Photoelectric sensors; Torque meters; Touch screens; Uninterruptible electrical power supplies; Voltage stabilizers; Voltage stabilizing power supply; Voltage surge protectors; Voltage testers; Voltmeters