Press the yellow On/Off button located on the lower left corner of the display to turn the unit on. It takes a few seconds for the device to power on completely.
Aim the thermometer at the object you want to measure. Stand at a comfortable distance.
Press the yellow trigger button on the handle of the thermometer. A red laser will protrude from the unit.
Move the thermometer until the laser rests on the surface of what you want to measure. If the laser does not reach the object, move closer to it. The temperature will display on the screen.