Hazard-Free：The Lasergrip 630 gives you complete control to measure the temperature of virtually any surface with custom and refined accuracy. Measure temperatures ranging from -58°F to 1076°F from a distance without ever having to come into contact or proximity to hazardous elements. Measuring Guide：With dual lasers, there’s no more guessing on what the size of the surface area you’re actually measuring. With a high distance to spot ratio of 16:1, you have the control over how wide of a surface you wish to measure. The two laser pointers will act as a visual guide for your measurements as the Lasergrip will calculate the average temperature of the space between the two laser points. For best accuracy, stand at a distance where the two points overlap. This device also allows you to adjust the emissivity to compensate for different surface textures. Whether scanning the heat on an aluminum tray or concrete road, the Lasergrip will deliver the same dependable accuracy to get the job done. Features & Specifications: 1.Measurement Range: -58°F ~1076°F (-50°C to 580°C ) 2.Storage Temperature: -20°C to 50°C (-4 °F to 122°F) 3.Operating Temperature: 0 °C to 50°C (32 °F to 122°F) 4.Accuracy:±2% /±2°C 5.Adjustable Emissivity:0.1-1.0 6.Resolution: 0.1°F /°C 7.Distance to Spot Ratio: 16:1 8.Selected Thermometer units: °C /°F 9.Response Time: ≤500ms 10.Battery/ Battery Life: 9V / about 12 hours Package Included: 1x Etekcity Lasergrip 630 Thermometer 1x 9V DC Battery 1x User's Manual Note: 1. This thermometer cannot test the temperature of target objects through across the glass. Besides, the steam, dust, smog will lower the accuracy of testing. 2. To make better accuracy, cover the surface to be measured with masking tape or flat black paint.