1. Multi-control modes for refrigeration, defrost, and fan. 2. Differential control mode with 0.1C temperature display resolution. 3. Multiple protection and alarm functions. 4. Digital display: Three-digit LED with minus digit and status indicator lights (for refrigeration, defrost, and fan). 5. Separate user and administrator menus for convenient operation and advanced settings. Model number: STC-9200 Measurement range: -50 to 90C Setting range: -50 to 50C Accuracy: 1C (-40 to 50C), 2C (50 to 70C) 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 Panel cutout dimensions: 71 x 34 mm Control type: ON/OFF control Setting method: Touch switch Front panel IP rating: IP65 Operating temperature: 0 to 55C (32 to 131F) Operating humidity: 20% to 85% RH, non-condensing Storage temperature: -25 to 75C (-13 to 167F) Product alias: STC-9200 freezer temperature controller, defrost thermostat, freezer thermostat Category: Temperature Controller Display Type: Digital Usage: Household Power Type: AC/DC Style: Panel Mount Color: Black Material: Plastic Package Contents: 1 x STC-9200 Digital Temperature Controller Note: Light and screen display differences may cause slight color variations between the image and the actual item. Measurement error allowance: 1-3 cm.