100% brand new and high qualityApplications:1.Measure car internal and external temeprature2.Measure air conditioned room indoor and outdoor temperature3.Measure refrigerator internal and external temeperature4.Measure fish pond water temperature5.Measure infant bath water temperature Specification:Power Supply Voltage: DC 4-28VMeasurement Temperature: -20~100Display Color: red + blueDisplay Way: 0.28 LEDRefresh Rate: 1s/one timeMeasurement Precision: 1Operating Temperature: -40~80Sensor Type: 2 x 1m NTC waterproof metal probeMinimum Resolution: 0.1Material: Plastic & metalDimensions: 48x29mm/1.89x1.14inchDisplay size: 0.56"Quantity: 1 SetNote: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank youUsing Introduction:1.DC Power Supply: this product needs to connect with DC 4-28V power; red wire connects with power positive,black wire connects with power negative.2.Display: when take off temperature sensor,digital tube will display "- - -"; when temperature is lower than -20 celsius or higher than 100 celsius, digital tube will also display "- - -".3.Normal Temperature Collection Range: -20~100 celsius. Package includes:1 * Digital Thermometer2 * NTC Sensor Porbe1 * Power Supply Cable