Great little tool. I got a cheapy at Harbor Freight, like $40ish, they have a dot com. Has night illumination, US & metric scale & the laser for sighting. Never thought Id use it much but Id now put it in my top 10 most useful tools list. Shot the temp of the 6 exhaust manifold outlets to see which one was missing..(the one that was 100 degrees cooler) When pipes froze last year, just ran the laser dot up the pipes to find the cold spot instead of guessing. Hit the cold spot with a heat gun & 3 minutes later Im done. Checked around the house to see where the cold spots on the walls were & improved the efficiency. Tried different types of wood in the stove to see which ones were hotter, how much hotter. Borrowed my Dads trailer with iffy tires, overloaded it for 500 miles & 'shot the tire temp frequently to find my best cruising speed to keep the temps down to prevent a blowout. Darn useful tool, been a couple years, havent even needed a battery change. -Scott