KEENOVO All-Purpose Digital Temperature Controller Box Fahrenheit & Centigrade Thermostat 30A 110V w/ Control Range of -30C~300C A complete control option, ready to be used with plug and waterproof sensor fitted. NO MORE tedious wiring before precise temperature is possible. Temperature Controlling Range: -30C ~ 300C Capable of display in Fahrenheit( Celsius by default) after Setting. Capable of providing timer function after Setting.