These heavy-duty, single-circuit mechanical time switches by Intermatic are designed for swimming pool/spa equipment control. They provide up to 12 on/off operations each day with the minimum on/off time of one hour. They are ideal for timed control of your filter pump, chlorinator, heat pump, lighting, and more. Housed in an attractive beige enclosure, the Intermatic timer mounts easily onto the side of your house near your other pool controls. The hinged door provides easy access to the industry's most reliable timers, and the lockable latch makes the enclosure tamper proof. 115V. 3.75 lbs. Dimensions: 9-3/8"H x 5-1/2"W x 3-5/8"D