The GMX2FM2D50-O-120 Two-Circuit Electronic Time Switch is a compact, electronic 24-Hour/7-Day modules with heavy-duty relay contacts for switching low or line voltage loads. The time switches are applicable for time-of-day control of pumps, fans, heaters, HVAC control circuits, lighting, machinery, and many other types of commercial, industrial, and agricultural equipment. The unit is mounted in a Type 3R enclosure.