Temperature measurement ,display and control Adopt differential to set temperature Compressor startup delay Alarm when Switches among refrigeration ,heating and alarm Model:STC-200 Whole product Size: 77x34.5x65.5mm Installing hole Size:70.5x28.5mm requirements: temperature: -5Celsius - +60Celsius humidity: 20%-60%(No condensate) Stored temperature:-30Celsius - 85Celsius Power Supply Voltage: 220VAC +/- 10%(12V+/-10%) Watt consumption:less than 5W Temperature measure range: -40-99Celsius Temperature controlling range: -40-70Celsius Resolution: 1Celsius Accuracy: +/-1 Celsius Input: 1 NTC sensor Sensor lenth:2M(include the probe) Relay Contact Capacity: 10A/250VAC/30VDC Display Type: DIGITAL Usage: Household Power Type: Charger Style: Standing Station Display Size: 1.9 Inches & Under colour:Photo color Material:plastic Package Contents: 1 x Temperature Controller 1 x Thermostat Cable Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.