WallarGe Atomic Digital Wall Clock Battery Operated, Self-Setting, Large Display with Temperature, Date, Day of The Week, Silent Wall Mount Digital Clock, 4 Time Zones, DST

Purchased for a resident in Assisted Living - perfect for that use. Sits nicely on a chest so that he can see it and knows the time, day and date. Very pleased with the quality. It paired perfectly with the date and time. Easy to set up.

This clock is PERFECT for the geriatric person who you need to help remind date and time. It is battery powered, so it can go ANYWHERE and the read out size is SO large that they won’t need there glasses to read it. Plus, it has auto daylight savings programmed in. It is exactly what I was looking for.

You have to read the directions in order to set it little complicated at first, but then once you read those directions, not bad very nice. You can hang it up or set it anywhere love it.

It's nice. Just remember to let it set itself. It will at midnight

I had bought a different clock and realized that it wasn’t battery powered. Then I stumbled on this one.The good: it runs on batteries, has a large legible display that I can easily read without glasses (I have 20/30ish) vision; has room temp and humidity, and month and date.And I was also looking for the atomic clock interface. Initially it seemed to have difficulty getting set. I set it manually for +5 minutes more than correct time to monitor. The next morning, the clock time was perfect!It has auto DST and I mounted it above a door in my office.I feel as it is a good deal and I am thinking of buying a 2nd one.

Nice clock! I have it mounted on a wall and the atomic clock signal is spotty. I have not seen a significant time drift when the clock wasn't in sync (it was less than 1 second over a month from my observations) but when it does sync up with the time server, it's spot on with the clock on my computer.What impressed me the most was that the basic instructions to adjust the clock are actually imprinted on the back of the clock itself. I can't tell you how many times I buy an electronic clock and can't figure out how to set the time after a power outage or time change! I have to search the internet to find the instructions since I can't remember what I did with the original manual.

I'll comment on two aspects of this clock: the atomic function and accuracy.Since it's sold as an 'atomic clock', I'll start with that.Atomicity------------I received this clock 12 days ago. I live in a top-floor apartment in a 3-floor building somewhere on the west coast of Los Angeles County, California; only around 880 miles from Fort Collins, Colorado. That's where the National Institute of Standards and Technology (NIST) broadcasts the 60kHz WWVB atomic-clock-based time radio signal. That signal has a 2000 mile radius and covers the entirety of the contiguous United States and reaches significantly large parts of Canada and Mexico. The building where I live doesn’t have a lot concrete or large metal structures; there isn’t a single tall building in the way between the clock and the low hills looming in the horizon; there’s no source of significant interference— powerful electric motors, high power lines… etc— nearby and the weather’s been beautiful those past 12 days. In short, as far as sight, I have clear near-line-of-sight to the source, and there’s nothing to cause poor reception. I’ve even used a compass and map to get the best directional cue after the first few failures.Yet, it seems a tall order for junk manufacturers to make products to receive the signal under these near-ideal conditions! I wonder if they even test their products in the US at all, the US being the only consumer, let alone test a statistically representative sample of locations within each state.First off, when I turned it on it, it did not receive the signal. I tried getting it to manually sync by pushing the WWVB button and waiting for it until it gives up— after 7 whole minutes, several times, including in the balcony, to no avail. It was very frustrating!Over the next three days I tried several spots and it would always fail, both manually and automatically. BTW, this clock and most of its ilk, like the not-as-bad 'Sharp' I purchased about 6 months ago, attempt to auto-sync several times late at night. According to this clock’s manual, it attempts the sync hourly for up to 3 times, starting at midnight.On the 4th day, I noticed that it had 'magically' synced. I noted the ‘sweet spot' where it did and kept it there until the 10th day. Throughout those 10 days, it was a hit-and-miss. However, it auto-synced in the ‘sweet spot' the last 3 days— of 10— in a row. On the 10th day, I noticed that time had jumped 40 minutes forwards, despite the indicated successful sync… just like that! And that's when I decided to return this piece of junk. Just for the sake of completeness, I found the ‘sweet spot' to be a tiny 2x2ft area on, and within a few inches off, a specific wall, and much lower than where one would normally hang a clock. Furthermore, manual syncing in the 'sweet spot' at an arbitrary time of day doesn’t work! So, it’s only auto-syncing that works, during the night, and only in the 'sweet spot!'Accuracy-----------The magical 40-min jump aside, I noticed that without syncing it would gain nearly a full second daily (~0.9.) That's about 5.5 min ayear. The manual even specifies 'free run' accuracy as ± 60 seconds, per month! Is that acceptable from ANY timepiece in this day and age? I don't think so. It means this clock uses possibly the cheapest oscillator out there. In this regard, the 'Sharp' I already have loses— instead of gains— about 0.7 second per day; it uses a cheap oscillator too, just not as bad!Worse yet, even when it does sync, it doesn't correct the ~0.9 second it had gained the day before! It seems that it's either designed to ignore minor drifts, or the ~0.9 second drift is itself one of the, many, design flaws. Either way, what's the point of ‘atomicity’ when accuracy isn’t a design imperative?Notes-------· The clock indicates successful syncing by the 3 curved lines (called “wave” in the manual) appearing above the fixed triangle (called “radio tower” therein.)· Gain and loss estimates are best-effort, and based on visual comparison with time display on a computer which syncs 3 times per day with NIST's NTP (Network Time Protocol) time servers.· The 'Sharp' I have has a similar 'spotty' syncing problem; it, too, has a poor WWVB radio receiver. Unfortunately, it worked somewhat acceptably in the place I was before, and my return window has closed many months ago. Apart from the weak receiver and oscillator unbecoming of the brand name, it's rather nice and sturdy, unlike this one. It supports up to 3 outdoor temperature sensors; it comes with only one, though. It's just not worth the $65 I paid Amazon for it, on account of the weak receiver. For reference, here it is:https://www.amazon.com/dp/B08S31FRDQ?ref=nb_sb_ss_w_as-reorder-t1_ypp_rep_k0_1_9&amp=&crid=YK3RQ60CQKOD&amp=&sprefix=sharp+ato· If you think you can live with manually setting clock, think again! This clock— and most of the ones of its ilk that I've checked out on Amazon— seem to have the design flaw of assuming it will successfully sync most of the time. Thus, their designers seem to pay little attention to how it will be set manually. There are only 2 buttons: Up and Down, to set just the hour and minute. The same butons are used to set other date components using the “Time Set” button to switch contexts. If you don't have nimble fingers and lighting-fast reflexes, you'll find it very trying to correctly adjust time to the second. And given how quickly in runs adrift, you'll probably have to go through that several times in a week. If you care for accuracy at all— as you should be if you're considering an atomic clock, you'll probably find it easier to just 'walk it' like a dog for up to half a mile to find a place where manual syncing succeeds! It's ironic really, it's a clock— an 'atomic clock', mind you— yet designed as if it were to be incorporated into a stove or microwave oven as a supplementary function!

So far so good. It sets the correct time itself. I took maybe 36 hours to sync up and get the correct time. I got the larger size and find it easy to read across a large room. Seems decent quality.