Description: Display Color: Red/ Blue/ Green Temperature Range: -30 to +800 ℃ degree Centigrade Temperature Accuracy: ±0.3 ℃ degree Centigrade Supply Voltage: DC 12V ±2V Sensor Type: K type thermocouple temperature, L=0.5m Specification: Overall Size: Approx. 48x29x23mm/ 1.89x1.14x0.91 inch Insertion Hole Size: Approx. 45.5x26mm/ 1.79x1.02 inch Display Window Size: Approx. 35x18mm/ 1.38x0.71 inch Probe Specifications: 304 stainless steel, Approx. 4x40mm/ 0.16x1.57 inch Resolution: when within 100 degree Centigrade it is 0.1℃, more than 100℃ is 1℃ Power Consumption: when within 50mA, it is 0.6W Refresh Rate: 500MS every time Anti-protection: Yes Working Environment: -20 to +50℃ Maximum Humidity: 90%-100%, Not Frost Package Includes: 4 Pieces Digital LED Temperature Thermometers Note: Please allow 1-3mm due to manual measurement, make sure you do not mind before you bid. The colors may be different for the different display, please understand.