Multi-control modes for refrigeration, defrost, and fan. Differential control mode with 0.1°C temperature display resolution. Multiple protection and alarm functions. Digital LED display with three-digit readout, minus digit, and status indicator lights for refrigeration, defrost, and fan settings. Separate user and administrator menus for convenient operation and advanced configuration. Model number: STC-9200 Measurement range: -50 to 90°C Set range: -50 to 50°C Accuracy: ±1°C (-40 to 50°C), ±2°C (50 to 70°C) Supply voltage: 220Vac, 110Vac, 50/60Hz; 12Vac/dc, 24Vac/dc Power consumption: Less than 5W Output types: Three mechanical relays Input types: Two NTC sensors Panel size: 75 x 34.5 mm External dimensions: 75 x 34.5 x 85 mm Mounting cutout dimensions: 71 x 29 mm Control method: ON/OFF Setting method: Touch switch Front panel IP rating: IP65 Operating temperature: 0 to 55°C (32 to 131°F) Operating humidity: 20% to 85% RH, non-condensing Storage temperature: -25 to 75°C (-13 to 167°F) Alternative names: STC-9200 freezer temperature controller, defrost thermostat, freezer thermostat Operating principle: Temperature controller Display type: Digital Intended use: Household Power source: AC/DC adapter (not included) Design: Panel mount Color: Black Material: Plastic Package contents: 1 x STC-9200 Digital Temperature Controller Note: Other items not included. Note: Lighting and display settings may cause slight color variations between the product image and actual item. Measurement error allowed: +/- 1-3 cm.