Review on 🔌 TRC AECM20020-3-012 Electra Check Digital Monitor for AC Power Sources - Black with White Face (Small) by Sean Skinner

I had some electrical problems in my short lived RV. Example: My microwave only lasted a year, my rooftop air conditioner failed after 2 years, my coffee maker died after 6 months. etc etc. I had no idea the generator in my RV was the cause. It delivered about 95 volts AC at 45 Hertz. This is a big problem as all 120V appliances require 120V at 60Hz. At such a low voltage and hertz it damaged my gear. So I bought this to see exactly what my alternator was doing and lo and behold the RPMs were set low to get the correct voltage and frequency. I hooked this up to a generator. ran and immediately saw what was going on. I increased the revs and wa laa. The alternator provided the perfect voltage. I saw an immediate improvement in the performance of my instruments and now I think I've gotten rid of frequent instrument changes. Another feature I like is the alarm. If the voltage or frequency rises or falls outside the "safe zone", an alarm will sound so you can take action and protect your electronics. Again, this is a must for RV owners. You can see exactly how much power you're getting from each source you connect. Protects your investment.