Voltage Test Monitor, DROK 2 pcs Plug in Digital Volt Meter for RV, AC 80-300V Flat US Plug LCD Display Voltmeter 110V 220V Voltage Measuring Monitor Panel Power Line Volt Tester Gauge

A purchase of two DM55-style pens In less than a week, I received 1 digital AC voltagemeter/voltage test monitor. A RV and an inverter generator to be monitored by the generator are parts of the purchase. It is a small animal. The average distance is approximately 2 miles A width of 1/8" and a height of 1" A standard meter would be 5/8" high and 1" deep (not including the two electrical prongs on the meter, so it'd extend out 1" from the electrical wall plug it's connected to). This is the actual face of the meter display Seventeen sixteenths of an inch wide and thirteen sixteenths of an inch Against the deep blue display, the meter's digits are presented in nice dark black, which should prove to be a good night light. According to the instructions on the box, the unit is accurate to about three decimal places In the range of 80 to 100%, it measures voltage It has an AC voltage of 300 volts. According to both meters, I have tested them against a true RMS voltmeter, and both have matched its reading. In the meter display, there are no tenths, just whole numbers for voltage dosage. In spite of the fact that the box instructions don't mention them, the Amazon product details for this device indicate that you can adjust the reading if the meter turns out to be The meters' readings were accurate, and I did not need to make any adjustments, but if there is any need for adjustment, there are four small phillips screws on the back of the device that can be removed for access to the potentiometer. In order to power the unit, all you need to do is plug it into an electrical outlet at home. Worked like a charm. It would be nice to know the voltage for both my RV camper and generator so I can avoid serious problems caused by too high or too low a The purchase that I made at this time is satisfactory to me.

Troy Small

| Jul 29, 2021

There was much worse that could have happened! Rather than using my multimeter, I bought these two voltmeters in order to keep a constant eye on power fluctuations. As a bonus, it can be used as a nightlight.

Fletcher Cordova

| Dec 12, 2020

In response to a very high voltage swing resulting from a bad neutral connection when the power company changed our transformer, we bought six of these. I am glad they were already plugged in from the beginning, than running around for a volt meter and plugging them into bare outlets when the lights started acting strange. I find them to be very effective for this purpose. Their measurement accuracy is not good enough to determine what voltage you have. There are +- in the specs More than 5% The voltage can be read from 116 volts to 124 volts in case your voltage is 120 volts. Our return was for a piece that was 10v off, which they quickly replaced for us. Other than that, the rest seem to be around +/- A standard deviation of two is 2v (two standard deviations).

Tanner Nolan

| Nov 11, 2020

I bought these after seeing reviews on the web so that I would not overheat or melt my main power cable. (30 amps) for my TT. An older campground with old electric is where you have to monitor the power coming in. The voltage meter plugged into the outlet allows a change in voltage to be noticed. You can use this method if you need to turn off Kerug or hold off on using the microwave until AC kicks on or even change the temperature so you don't have to run as many times. It turned out I needed to replace the RV cord. I purchased a surge protector but it was an inexpensive one that didn't shut off power if the current drops too low. According to research, you do not want your voltage to be lower than 108 volts. On the internet, I found that it is important to verify the voltage.

Hendrix AKHTAR

| Jul 02, 2021

During the course of building a tiny house that will be hooked up to shore power through an extension cord, a device such as this voltage monitor will ensure that everything is working perfectly. There is something sleek and stylish about these plugs LED displays actively monitor the voltage flow through a circuit when present in devices with an easy-to-read LED display. Plugging the device into an outlet in either direction is possible with these reversible chargers. As it turned out, they came in handy when I noticed they had no longer illuminated and they were connected to an outdoor outlet that had tripped (a ground fault circuit interrupter had tripped from an exterior garage outlet due to a large air compressor running.

Ivan Rose

| Dec 26, 2020

The monitoring equipment on several of my large UPS units runs 24/7. The voltage reference was installed so that you could see how much voltage the units produce without being near them. I find them easy to read and it seems like they are quite accurate, too. It would be a good idea to purchase them again.

Layla Welch

| Mar 29, 2021

I find these AC voltmeters to be very useful. This is an easy-to-use program. Upon plugging them into an AC outlet, they will power up. It has a large backlit display that makes it easy to read. There is even an internal adjustment so that it can be calibrated against a known accurate AC voltage standard. I think this is a great product!.

Sylas Burton

| Aug 01, 2021