Review on ⚙️ Klein Tools MM400 Multimeter, Digital Auto Ranging, AC/DC Voltage, Current, Capacitance, Frequency, Duty-Cycle, Diode, Continuity, Temperature 600V by Michael Vargas

I've been using these little orange electronics for a few months now and have some tentative opinions. a main meter (obviously) or even a serious DIYer. It mostly lacks range, overall accuracy, and true RMS functionality. However, for the home gamer or as a cheap backup for your Fluke, this little guy is pretty good. Pros: Readings are crisp and clear, and the backlight works beautifully. The wires are flexible and their ends will fit into household outlets when the CAT IV plastic covers are removed (yes). The included K-type thermocouple has a long range (over 12 inches) and is consistent with my other instruments up to about 400 degrees within 1 degree Fahrenheit. The continuity test is pretty decent and has a light and beep, which is great for environments where hearing protection is required. The rubber casing that surrounds most of the device is grippy and feels pretty solid. It says the meter can be reduced to one metre, which can be confusing, but I think I'll go with the metric interpretation in this case. The kickstand is pretty cool too; It slides out from the back and has rubber feet that are effective in holding the meter in a comfortable viewing position on most semi-flat surfaces. Finally, this meter is very versatile and has all the standard features in addition to AC/DC current, frequency, duty cycle, thermocouple temperature, capacitance and diode testing. He can do quite a lot, even if he can't do it as well as a $200 meter. Safety: This meter is equipped with two slow-burning ceramic fuses that meet the industry standard for safety and protect you from shattering if you accidentally touch the wires of the 1.21 gigawatt power supply in continuous mode. You connect the wires to the circuit, press the HOLD button and the instantaneous reading freezes on the display for you to read. Compare this to the Fluke function where you press the HOLD button and then connect the wires and the meter will beep and hold your number on the display once the reading stabilizes. Maybe Fluke has a patent pending for this technology - it would be interesting to know why other companies aren't doing something similar. Is this feature worth the extra $150 for a non-professional? Probably not. Next, the continuity/low resistance tester has a slight lag. That means you have to make a full circuit for more than half a second for the block to beep, indicating low resistance. This may not be a problem for you, but if you drag a pin across a row of pins in an attempt to find a short, you'll quickly find that the continuity indicator delay is a bit, well, sluggish. However, some high-end meters also have this problem, so it's definitely not a big deal for this little guy to miss this area as well. But you should consider that before you buy. All in all: This is a decent little gauge that can do 90 percent of the things a DIYer would want it to do.