Precise laser technology for more accurate and repeatable measurements. Large, easy-to-read backlit LCD display for easy viewing. Small and lightweight design fits easily fits into your tool box. 10:1 distance to spot ratio . IP40 rated for extra protection against airborne contaminants. Displays the minimum, maximum or average temperature, or the difference between two measurements. Hi and Lo alarms for rapid display of measurements outside the limits. Powered by one (1) AA battery. One year warranty.