This a line voltage monitor I installed just below the fridge and beside the panel. It's an LED readout made by Datel. Made in the good 'ol US of A. I paid 2-3 times more than the commonly available offshore ones, but it should last forever. I made an opening in a standard residential cover plate and mounte that to a "renovation" type electrical box.
Now we (I guess me, being the male) can see what the line voltage is doing at a quick glance.
Another cool benefit is that it makes a great night light. DW loves that feature....
