Aqua Logic NEMA IV Dual Stage Digital controller for heater and chiller with titanium temperature probe. 115 volt. For 1/6 HP through 1/2 HP chillers. -30 degrees F to 220 degrees F. Differential range: 1 degree F to 30 degrees F. Size: 6.50 inches x 2.75 inches x 2.75 inches. Six foot probe cable. Up to 15 feet available for nominal extra charge.