Description: Power supply voltage: DC 12V/ AC 220V The item employs MCU control system and highly accurate temperature detection probe This product uses the design of three display windows which can perform real-time display for start and stop value. Moreover, it has other functions such as intermittent work, time switch, etc. It can be used in greenhouse cultivation, aquaculture and animal husbandry, computer lab temperature control and other fields. Specification: Temperature measurement range: -55~+120 Celsius degrees Temperature measurement accuracy: ±0.3 Celsius degrees Resolution: 0.1 Celsius degrees Temperature control range: -19~99 Celsius degrees Control accuracy: 1 Celsius degree Temperature measurement probe: NTC10K/B3950 standard 1m water-proof probe Applicable environment: -25~55 Celsius degrees, humidity 20%~85% (no condensation) Output type: 10A relay output Operation instructions: After power-on, if the temperature is within the range, you should immediately start the output and make it stop when it reaches the set value. Heating mode：Start temperature stop temperature SET: power-on & power-off button In the state of power-on, you can switch off by a long press for 3 seconds. After switched off, it will still remain power-off if there is no power supply. In the state of power-off, you can switch on by pressing SET once. After switched on, it will still remain power-on if there is no power supply. Size Chart: Dashboard: approx. 90mm×60mm/3.54''×2.36'' Installation size: approx. 70×50mm/2.76''×1.97'' Package Includes: 1 Piece Digital Temperature Controller with probe Note: The item of 220V can only control the heating rod and bulb; can't connect to the AC contactor.