This non contact thermometer is a point and shoot thermometer that will give you temperature changes in seconds. It reads surface temperature of things by reading the Infrared Heat Signature coming off it. Everything above absolute zero gives off an IR heat signature. This type of thermometer works on the same principals that PIR motion sensors and thermal imagers work. When this is pointed towards an area it will read the surface you are pointing it at unless something, that may not be visible to the naked eye, is in front of that surface and then it will show you a sudden temperature fluctuation that you will not find again and not be able to duplicate. It's a great way to detect unseen things that are giving of an IR heat signature like a solid object.

Works on a 9V battery
The body color may vary