Review on Digital Infrared Thermometer Tool Gun With Adjustable Emissivity Non-Contact Laser Temperature Gun With Max/Min Measure For Kitchen Cooking Industry Automobile -58°F ~ 752°F by Jeff Alradwan

A good thermal gun for $. If you know or can understand or learn from instructions and diagrams. How to calibrate (use an analog or conventional thermometer as the standard temperature) and set the EMS according to the attached table. Then you can get a fairly accurate temperature. Readings, within +_- 1 degree. To switch from c to f, press and hold the left button for 2 seconds or turn off the laser with the right button 2. The center button selects the modes that appear on the screen. Then use the r+l keys to increase or decrease the values. Works just like everyone else. None of them are automatic. They are delivered from the factory with preset standard settings. But you can change them. So for $1, this one does the same thing as the more expensive models. And if you don't like Revain, give them a call, they'll send you another model and give you a free returns label.