The 42510A Compact thermometer measures temperature with 0.1 degree resolution for readings up to 999.9 degrees. Adjustable High/Low set points with audible alarm alerts user when temperature exceeds the programmed set points. Adjustable emissivity for better accuracy on a variety of surfaces. Built-in laser pointer identifies target area. Backlighting illuminates display for taking measurements at night or in areas with low background light levels. Data Hold and Min, Max, Over range indicator and Auto power off functions. Complete with 9V battery and pouch case.