This product is a mini temperature controller designed for use with home freezers, water tanks, refrigerators, steamers, industrial equipment, and other similar applications. Functional units include a compact temperature controller that is easy to use and operate. Features large, clear indicator lights for improved visibility. Offers a wide temperature measurement range with both heating and cooling control, allowing users to switch between cooling and heating modes. Includes relay output and a delay function to help protect the connected appliance, such as a refrigerator or heater, extending its service life. Temperature measurement range: -55°C to 120°C. Suitable for use in home and industrial environments for temperature regulation. Features: Item Type: Temperature Controller Power Supply: 12V, 110-220VAC (optional) Temperature Measurement Range: -50°C to 99°C Resolution: -9.9°C to 99.9°C, 0.1°C Accuracy: ±1°C Sensor: Waterproof NTC10K sensor Operating Environment: -10°C to 60°C, relative humidity 20%–75% Refresh Rate: Approximately 0.5 seconds Dimensions: 79mm x 43mm Cutout Size: 76mm x 39mm Package Weight: 49g (1.72 oz) Package Dimensions: 80 x 43 x 22mm (3.14 x 1.69 x 0.86 inches) Package List: 1 x Temperature Controller 1 x Probe Line (1M) Note: Measurements are manually taken; please allow for a small margin of error. Color may vary slightly due to lighting and screen settings. Actual product may differ slightly from images shown.