Non-contact Infrared Thermometer: Temperature range : -50°C to 400°C(-58°F to 752°F) Accuracy: ±1.5°C or ±1.5% °C/ °F setting Resolution: 0.1°C or 0.1 °F Operating temperature: 10-40°C, humidity: 10-90 RH Storage temperature: -10-40°C Response time: ≤0.8 second Distance to Spot Ratio: 12:1 Emissivity setting: 0.1-0.99(de°Fault value:0.95, testing different material easy and accuracy) Power: 2pcs 1.5V battery Back lighting Automatic power °F in 10 seconds Use in: Industrial thermometer, kitchen temperature, object's serface temperature etc. Kindly tips: D : S= 12 : 1, means the Distance to the Spot Size of the unit is 12 : 1. As the Distance(D) from the target increases, the spot size of the area measured(S) by the unit becomes larger. So in order to accurate temperature, please pay attention to the Distance to Spot Size, or it get some error if you neglect this. Thermometer collects the infrared radiation energy from of the stuff that is focused by red laser, and transfer this information into electric signal via photodetector, then analyze and calculate its temperature. So please keep in mind that what you get is the temperature not inside temperature. Color: Yellow & Black Material: plastic Package Contents: 1 * Infrared Thermometer Only the above package content, other products are not included. Note: Light reflection 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.