The Diehl TA-4071 is used in a number of spa applications. This 24 hour timer has 96 individual trippers on the front dial. Each tripper controls a 15 minute section the day. The on time is controlled by pulling each 15 minute tripper outward from the face. The motor in the clock requires 120 volts of AC input power. Plastic Case Height: 2-7/16" Width: 2-7/16" Depth: 1-1/4" (Total including dial) Purchase Borg Pool Spa parts from PoquePoolSpa.com today!