This sleek, pen-sized unit instantly gives you the surface temperature of whatever you point it at. Highly accurate testing from –27° to +428° F, and housed in a patented metal cylinder that reduces electrostatic and electromagnetic interferences when testing electronic components. Point at tires at every gas stop and learn if a tire is suddenly low. Instantly and without bending down. When tire pressures drop even a little, tire temps go up a lot. A quick accurate no-installation tire pressure monitor if you want extra peace-of-mind. And while you are at it, gas stop wheel hub temps confirm wheel bearing health. Perfect for testing the temperature of anything anywhere on your bike, measure mufflers, headers, brake rotors, tires, or a cold beer. Batteries included. 3.5", 2 oz.