With 4 functions: cooling, heating, temperature correction, single sensor. It can be used for water tanks, refrigerator, freezer, boiler, steam, and a other temperature controlled device.This product use in many applications, for example, heaters, coolers, aquarium, and other cooling or heating device that requires automatic switching. refrigeration control output time delay protection Alarm when temperature exceeds limit temperature or when sensor error.Stable, repeatable, compact, easy to assemble and program: calibrated, then mounted Features: Automatic conversion of cooling or heating mode control -Temperature setting value adjustment temperature and diversity value temperature -Calibrazione output delay protection -Refrigeration control -Radio when the temperature exceeds the limit temperature or when error sensor. -With large and clear LED display for better readability. Largest temperature measurement range. Parameters -All can be set to default after short circuit. - Specifications And Sizes -Front panel size: 7.5 (L) x 3:45 (W) cm Mounting dimensions: 7.1 (L) x 2.9 (W) cm sensor-length: 2m (including probe). -Product size: 7.5 x 3.45 x 8.5cm - Technical -Campo Temperature measurement -Parameters: -50-99C Resolution: 0.1C -Accuracy: 1C (-50-70C) -Power supply: 220VAC 10 percent , 50 or 60Hz Consumption -Power: 3W -Sensor: NTC (1pc) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.