Specifications: Using MCU control system and highly accurate temperature detection probe, this product is clearly better than other products of the same category in terms of temperature control performance and accuracy. 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 widely used in greenhouse cultivation, aquaculture and animal husbandry, computer lab temperature control and other fields. It is also a great helper for household life! Usage Method: Plug the plug of this product to a household socket. If the screen displays temperature, it means the power supply has been correctly connected. Put the temperature control probe into the places that need temperature control, and set the start and stop temperature according to your needs. Plug the plugs of heating and refrigeration devices to the socket of temperature controller, and then you can achieve temperature control. Item Name: Thermostat Testing Temperature Range: -55 - 120 Testing Temperature Accuracy: 0.3 Temperature Control Range: -19 - 99 Control Accuracy: 1 Operating Temperature: -25 - 55 Operating Humidity: 20% - 85% Output Type: 10A Relay Output Panel Size: 90mm x 60mm x 25mm/3.54" x 2.36" x 0.98" (Approx.) Opening Hole Size(M3 Screw Hole): 70mm x 50mm/2.76" x 1.97" (Approx.) Screwing Pitch: 80mm/3.15" (Approx.) Notes: The connection method of 12V or 220V is same, 12V should differ the positive and negative charges, 220V should differ L & N. Due to differences in lighting and screen settings, the color of the project may be slightly different from the picture. Due to different manual measurements, allow for slight size differences. Package Included: 1 x Thermostat