I bought the version -50 ° C to + 750 ° C this thermometer and I must say I was pleasantly surprised, the thermometer is pretty well finished, it works very well (to the point that takes the game to measure the temperature of everything and anything with) and is supplied with 9V battery.
The measurement diameter varies with distance, that's why you have to be close enough small objects (eg a lamp) to have their exact temperature, if we measure the + object that surrounds it. The diameter measurement is displayed on the side of the machine (visible on one of the photos).
