infared thermometer and it's really cool. Point it at something you want to test for temp and it reads off the red laser dot. What this have to do with a motorcycle you ask? Well, I thought that I could check the temp of the exhaust headers to see if all the cylinders were firing equally. Could even find a dead or fouled plug if needed. Haven't tried it yet, but will the first chance I get. I picked up the unit from Harbor Freight a local discount tool store for about $21 bucks after a 15% discount coupon. It's fairly small and will fit right in with the rest of the things in the tool bag.