The Milwaukee 2277-21 M12 Temp-Gun HVAC/R Laser Thermometer is a pistol-grip, infrared device designed for professional commercial and industrial use. The Milwaukee 2277-21 safely measures temperatures between -22 and 1,472 degrees Fahrenheit. It offers a 40-to-1 distance-to-spot ratio. The 2277-21 features an extra-bright LED flood light for enhanced productivity. With the purchase of the 2277-21 receive a free M12 2.0 Ah Red Lithium Compact Battery.