Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: does it record volt changes through out the day while I'm away? is there any notification if voltage drops below safe operating range?
Document: I've had it plugged into the AC power in my bedroom for about a week now and it is still working fine. I can see the line Voltage occasionally go up or down by about a Volt.
For my PopUp, I'm not running the AC when I'm not in the camper, so its not a big deal for me.
Excellent item to have for your camper or RV. Many people worry about line surge, however I have found low voltage to be a MUCH more common problem. If there aren't enough volts, you'll fry your onboard systems and appliances. I put one of these in a spot where I can see it clearly; if I'm running my AC or other high draw appliance and notice the volts are below 115, its time to turn things off and wait for the campsite to come back to normal.
Makes checking Shore Power pedestals at the campground a snap. Checks polarity and voltage in a few seconds and lets me know its safe to plug in my camper. Plan to also use it this summer to monitor the voltage on those hot summer days when everyone is running their AC units at the camground.
Does what it says it will do. I like to monitor the voltage and this seems pretty accurate. Matches what my multi meter says. I can see the display from 10 feet away and I wear trifocals.
This volt meter is very  handy to have when your power goes out and you are running on generator power. It helps you monitor your current
Give you everything you would hope for a quick diagnostic look at your power, except for Hz. Wish it did that, but not going to dock it. If you need a Volt meter, this is a good one that will tell you the wiring condition as well.
We only blew a breaker once when I forgot to turn off the A/C and ran the microwave. so running the fridge/water heater/A/C was fine and we fluctuated between 112 to 117 most of the time turning on the MW with everything else on blew the main inside the trailer most of the time. We were able to make a habit of looking at the meter though out the day to keep tabs on the voltage
And what I found was that they both read the exact same voltage, as my house voltage varied up & down. So now I feel comfortable that when ever I use this simple plug in meter (mostly in our RV when we travel, just to make sure that the outlet voltage is in the acceptable range, and not too low) is indeed accurate (ie. believable). So thanks for a great product, that also passes the heavier than expected weight test.
I bought this to keep an eye on the aluminum wiring in my 1968 house. Was noticing dimming of lights on some circuits so I plugged this monitor into an outlet where I can easily see it. Found out my 61 inch DLP tv and other tv's draw a lot of current, but my small laser printer is the real hog when its on. The monitor shows me when the appliances cause voltage drops on the circuits. I am completely satisfied with its performance.
Answer: yes