This tool is great. Handy for lots of uses. Even taking child's temperature (not the intended use). Accurate....easy to use....durable....battery lasts a long time...even can be used as cat toy! (Cat loves to follow laser light dot) I use it to monitor my wood stove and check for cool spots in house in winter (holes in insulation or places where outside air is entering house). Very satisfied with this tool. Even handy in the kitchen for lots of things including to see if oven temp is correct.