1. Multi-control modes: refrigeration, defrost, and fan. 2. Differential control mode; temperature display resolution: 0.1°C. 3. Multi-protection and alarm functions. 4. Digital display: 3-digit LED + minus sign + status indicator (refrigeration, defrost, fan). 5. Separate user menu and administrator menu for operation and advanced settings. Model number: STC-9200 Measurement range: -50°C to 90°C Setting range: -50°C to 50°C Accuracy: ±1°C (-40°C to 50°C), ±2°C (50°C to 70°C) Supply voltage: 220 VAC, 110 VAC, 50/60 Hz; 12 VAC/DC, 24 VAC/DC Power consumption: < 5 W Output types: Three mechanical relays Input types: Two NTC sensors Panel size: 75 × 34.5 mm External dimensions: 75 × 34.5 × 85 mm Cutout dimensions: 71 × 29 mm Control method: ON/OFF Setting method: Touch switch Front panel IP rating: IP65 Operating temperature: 0°C to 55°C (32°F to 131°F) Operating humidity: 20% to 85% RH, non-condensing Storage temperature: -25°C to 75°C (-13°F to 167°F) Alias: STC-9200 freezer temperature controller, defrost thermostat, freezer thermostat Display type: Digital Usage: Household Power type: External power supply Style: Standalone unit Color: Black Material: Plastic Package contents: 1 × STC-9200 Digital Temperature Controller Note: Color may vary slightly due to lighting and screen settings. Measurement tolerance: ±1–3 cm.