Digital Temperature Controller, Ecspark Mini 10A 110V Temperature Controller with Thermocouple Sensor (-58~194&deg;F) LED DISPLAY -- With large and clear LED display for better readability. MINI AND WIDE RANGE -- A mini temperature controller with wide measuring range. (-58~194F) DELAY FUNCTION -- Temperature calibration and delay protection function. HEAT OR COOL -- One relay output for heat and cool control, but can not do them at the same time. WIDELY USE --Can be used for water tanks, refrigerator, industrial chiller and industrial equipment.