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

I've been using them for about a decade and they're doing a great job on our remote California ranch which is completely off the grid. We can control the power level in our cubicle, laundry room or wherever we work. Of the dozen I bought, one came with a crystal that gave a reading that was difficult to see. I ended up throwing it away after trying to call the supplier once. I would advise buyers to connect a monitor to test the operation of the crystal display before discarding the packaging. Perhaps you are one of those unlucky recipients who received a lemon. I will continue to buy these as needed as I still find this to be one of the best values for a plug-in power monitor.