Review on AstroAI TRMS Digital Multimeter: 4000 Counts Auto-Ranging Ohmmeter Voltmeter, Battery Voltage Tester for 1.5v/9v/12v, Measure Voltage Current Resistance Diodes Continuity Capacitance with NCV Function by Jeremy Yuusuf

Great product but instructions could be better. Two light bulbs above my kitchen sink stopped working. I said it was strange that both lightbulbs blew out at the same time. So I switched both and still nothing. I then googled what might be wrong and it suggested that the actual light switch might be bad. When I turned on the light, I heard a faint crackling noise, so I assumed that was it. Then I checked again with this multimeter to see if there was actually power at the light switch, and that was it. I went to Home Depot and bought a new light switch for $1.78, turned off the power at the breaker box; double checked with a multimeter that the power supply is off; swapped the switch and it was fixed. The reason I gave the multimeter four stars is because as a DIYer, the instructions are great at explaining what each function is, but poor at explaining when to use each function. I had to do a lot of googling to make sure I was using the right features for my app. 5 stars if you could add a little more information.