This is your best deal in a basic infrared gun. Designed for broad general purpose use in research, industrial applications, HVAC, construction, repair or maintenance services, and even around the house if you"re technically inclined. Read temperature instantly from a distance. The quality lens and machined baffles ensure accuracy with a 8:1 distance-to-target spot ratio. A few examples provided to this article include: • Detecting clouds for remote telescope operation •Checking mechanical equipment or electrical circuit breaker boxes or outlets for hot spots •Checking heater or oven temperature, for calibration and control purposes •Detecting hot spots / performing diagnostics in electrical circuit board manufacturing •Checking for hot spots in fire fighting situations •Monitoring materials in process of heating and cooling, for research and development or manufacturing quality control situations New features include that you can set the SainSonic SS5380 to read a variety of different surface materials. Operation is simple. Pull the trigger to instantly read the temperature of the surface you"re pointing at. Let go of the trigger and the reading will stay in "Hold" for several seconds so you can take note of it. While the trigger is depressed, you can also scan looking for maximum or minimum temperatures as you move the laser across a larger target. A useful feature in finding hot or cold spots in walls, insulation, heated objects or larger areas. So the SainSonic SS5380 will beep for readings below or above your preset thresholds. The main display of the SainSonic SS5380 is big enough to read and it"s backlit for easy viewing anytime. Batteries are included.