Temperature Range： -50 °cto 1300°c (-58 °Fto 2372°F) Temperature resolution ： 0.1°c/°F Emissivity Adjustable ： 0.1~1.0 Optical Resolution： 50:1 Distance to spot size- ratio Basic accuracy ： ±1.5% of reading ±3.6°F(+2°c) Response time： <1 second Diode laser output ： <1mW a 630-670mm class 11 laser produce Spectral response： 8~14μm Power supply ： 9V battery, NEDA 1604A or IEC 6LR61, or equivalent Precise Non-contact measurements Unique flat surface, modern housing design Laser Targeting LCD with back light °c or °F select switch laser ON/OFF switch Automatic power off Over range indication Max,Min DIF,AVG record Adjustable emissivity High and low alarm .