1. Multi-control modes among refrigeration,defrost and fan. 2. Differential control mode, and the resolution of temperature display is 0.1. 3. Multi-protection and alarm modes. 4. Digital display: Three-dig it LED +Minus digit+Status indicator light(set refrigeration; defrost; fan). 5. User menu and administrator menu can be set separately. Not only convenient for user operation, but also left enough space for the adjustment of high-level management. Model number: STC-9200 Measure range: -50 to 90 C Setting 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 Panel size: 75x34.5 mm External dimensions: 75x34.5x85 mm Perforation dimensions: 71 10x29 10 mm Control : ON/OFF Control Setting : 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) Alias name: STC-9200 freezer temperature controller, defrost thermostat, freezer thermostat :Temperature Controller Display Type:DIGITAL Usage:Household Power Type:Charger Style:Standing Station color:Black Material:plastic Package Contents: 1 x STC-9200 Digital Temperature controller Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.