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 compatible user operation, but also left enough space compatible the adjustment of high-level management.Model number: STC-9200Measure range: -50 to 90 CSetting range: -50 to 50 CAccuracy: 1 C (-40 to 50 C), 2 C (50 to 70 C)Supply voltage: 220Vac, 110Vac, 50/60Hz; 12Vac/dc, 24Vac/dcPower consumption: Less than 5WOutput types: Three mechanical relaysInput types: Two NTCPanel size: 75x34.5 mmExternal dimensions: 75x34.5x85 mmPerforation dimensions: 71 10x29 10 mmControl : ON/OFF ControlSetting : Touch switchFront panel IP Rating: IP65Operating temperature: 0 to 55 C (32 to 131 F)Operating humidity: 20% to 85% RH, non-condensingStorage temperature: -25 to 75 C (-13 to 167 F)Alias name: STC-9200 freezer temperature controller, defrost thermostat, freezer thermostat:Temperature ControllerDisplay Type:DIGITALUsage:HouseholdPower Type:ChargerStyle:Standing Stationcolor:BlackMaterial:plasticPackage Contents:1 x STC-9200 Digital Temperature controllerOnly 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.