AcuRite 75099M 10-inch LED Digital Clock with Auto Dimming Brightness Red

The Accurite Digital Clock is big! The digits are bold and bright. Bright, yes, bright. I considered giving this clock 4 stars for the lack of a dimmer option. If you need a good night light, this is it. It throws a red light around. That said, the thermometer seems accurate enough and the accuracy of the clock may, I've not proven this yet, waffle slightly. I can see it and the clock on the screen of Grace Digital's Encore+ internet radio. Sometimes the Accurite will display a minute ahead of the Encore+. I'm sure it's not a whole minute, just that little bit to vary with the Encore+. It may be the Encore+ is the one that varies. We know computers can't keep time, never have been able to keep the CMOS clock correct. Microsoft built in clock resets into Windows for years and years. I should test them both against Apple's iPad and iPhone. Are they any better? It appears this Accurite digital clock is quite sufficient. A few seconds fast, if it is, should not be a problem for anyone. One more time: ITS BIG! Perhaps it can be read from the other end of the bleachers with no binoculars. Ha! Oh! The two double-A batteries in the back do their job. Twice I've tested it by cutting off its 5-Volt from the USB supply. I recommend this clock. Just know it's big and it's bright.

Perfect for our 1800 ft basement. The picture makes it appear brighter than it is with the lights off, but it’s more than adequate. It’s visible from the farthest areas. Easy to set up and adjust.

After making several comparisons I chose this wall clock and it has already proven to be an ideal choice. It is easy to set up, keeps accurate time and the large numbers, etc on the screen can be easily seen from across the room which was a bonus for we senior citizens. I have no regrets about this purchase and planning on ordering more as gifts.

I bought this clock in August to help my kids keep track of the time and date for cyber schooling. I wasn't sure how I'd like a blazing red LED institutional looking clock on my wall and I was a little concerned the light would overwhelm the room. I initially preferred blue, but the price was so much higher I went with red. I decided to go with Acu-Rite over an unknown brand because I have their hygrometer that still works great five years later.Turns out, we love the clock. The red is bright and has a nice, smooth glow, but doesn't burn your eyes or discolor the room. I can easily read it from two rooms over, so I can do chores and still make sure my kids are online at the right time.There was a problem, though. Just a little over a month after hanging it on my wall, I woke up in the morning and the display was completely black. I tried another outlet, which confirmed that the clock did not work.Since it was past the return date on Amazon, I went to Acu-Rite's website and chatted with a representative. (Currently, they only offer support through chat and email due to COVID.) While on chat, I provided my receipt and pictures, and THAT SAME DAY, they shipped out a replacement. Two days later I have a working clock before the start of a new school week!I hope this new clock works for years like my hygrometer. While I can't speak to the longevity of this unit, many people seem happy with theirs based on the high reviews, and at the very least, I can say that Acu-Rite stood behind their warranty and acted extremely quickly with respect to sending out a replacement.

This display is large and very bright. Its easy to read from long distances. It was easy to hang with 2 screws and the included screw template was perfect. The button placement and cable management features are well thought out.I had some apprehension because some reviewers said it had really bad accuracy and the time drifted. I've run this one for two weeks now and while that's not very long, I'm not seeing any noticeable drift in the accuracy. Will update this post if I begin to see that issue.The only issues I have with the clock, and the reason for a 4-star review instead of 5, are two simple features that are missing:(1) The clock will ONLY do 12 hour format. It won't do 24-hour format. If this was explicitly stated in the description I missed it, and was really looking for it to do the 24-hour format.(2) There is no brightness adjustment. The clock is extremely bright and very easy to read, but in even slightly dark environments like operations centers or some offices it is too bright. It can be glaring to look at directly, and casts enough light that it illuminates the room and I don't even need to turn the lights on to walk to my console. I don't understand why there isn't a dimmer for this clock, not even a high - med - low button.(3) (Added 2020-09-18) This clock does not indicate when there has been a power failure; it will reset and continue reporting the [incorrect] time as though nothing had happened. No blinking numbers, no blinking colon, nothing.Update 2020-09-20:I discovered an important quirk about this clock. The clock requires power from the 5V 1.2A adapter to operate, although it also accepts 2 AA batteries for backup in the event of a power failure. During the power failure mode with batteries installed it will keep the time but with no display, and resume with the correct time after power is restored. That behavior was to be expected, but here is the important part: If the backup batteries are not installed and the clock loses power, once power is restored and the clock resets there is NO INDICATION that there was ever a power outage. I had a power flash at approximately 2300 one evening, and I was halfway through the next day before I realized that the clock was an hour fast. The power blip had reset the clock but there was no way to tell that anything was wrong without comparing it to another reference source. Even a $5 wal-mart alarm clock will blink to let you know that the power was interrupted. So if you get this clock, be certain to install and maintain the backup batteries or a power outage may cause the clock to start lying to you.