Sharp 12-Inch Atomic Wall Clock, Battery Operated, Glow in Dark | Self-setting atomic time; Easy-read analog face; Automatic time adjustment; Simple setup; Versatile home or office style
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Availability:
In Stock.
Arrives
Sunday, Aug 9
Color: Black/Glow in Dark
Size: Large
Features
- GLOW IN THE DARK ATOMIC CLOCK: See the time, Day or Night!, with the Sharp Atomic Clock with Glow in the Dark numbers and hands. For best results with the Glow in the Dark function: when you first receive the clock, place the clock in sunlight or bright light for 24 48 hours. After this time period, the clock will glow in the dark. The clock benefits from exposure to light during the day for optimum glow at night.
- ATOMIC ACCURACY: The Atomic clock has a built-in receiver that automatically synchronizes itself with the WWVB radio broadcast by the US Governments National Institute (NIST) in Fort Collins, Colorado. The Atomic Clock will always be accurate to within one second as it receives daily WWVB updates.
- AUTOMATICALLY SETS: Clock resets regularly by radio-control to match the US Atomic Clock in Colorado and adjusts automatically for daylight savings time
- BLACK STYLISH FRAME- GLOW IN THE DARK NUMBERS AND HANDS: Frame design and hands add style and longevity to any decor in your home or office
- BATTERY OPERATED - (Requires 1 x AA batteries - not included)
- EASY TO READ - EASY TO USE: Simple, easy to read style fits any decor and is easy to read - perfect for any room in the house: den, office, kitchen, kids room, garage
Description
GLOW IN THE DARK ATOMIC CLOCK: See the time, Day or Night!, with the Sharp Atomic Clock with Glow in the Dark numbers and hands. For best results with the Glow in the Dark function: when you first receive the clock, place the clock in sunlight or bright light for 24 – 48 hours. After this time period, the clock will glow in the dark. The clock benefits from exposure to light during the day for optimum glow at night. Glow in the Dark! Keep track of time Day or Night with the utmost precision with this attractive atomic analog wall clock from SHARP! Remove the yearly hassle of changing your clock for daylight saving time with the Sharp 12 in. atomic wall clock. Its features include Self-setting time based on your desired time zone, an attractive black frame and stylish large numbers for easy viewing. By radio communication with its built-in antenna, the clock regularly updates the hour, minute, and second of the day for continued accuracy from its source, the United States Atomic Clock in Boulder, Colorado. Additionally, the clock adjusts automatically for daylight savings time in the spring and fall. For best results with the Glow in the Dark function: when you first receive the clock, place the clock in sunlight or bright light for 24 – 48 hours. After this time period, the clock will glow in the dark. The clock benefits from exposure to light during the day for optimum glow at night. Sharp has been making quality alarm clocks for over 25 years and is the largest suppler of Retail Alarm Clocks in the United States with over 61,000,000 sold. Millions trust us with helping them start their day and staying on track
Brand: Sharp
Color: Black/Glow in Dark
Display Type: Analog
Style: Contemporary
Special Feature: Atomic
Product Dimensions: 12"W x 12"H
Power Source: Battery Powered
Room Type: Living Room
Shape: Round
Indoor/Outdoor Usage: Indoor
Display Type: Analog
Additional Features: Atomic
Power Source: Battery Powered
Indoor Outdoor Usage: Indoor
Mounting Type: Wall Mount
Number of Batteries: 1 AA batteries required.
Alarm Clock: No
Operation Mode: Atomic
Watch Movement: Automatic
Item Dimensions W x H: 12"W x 12"H
Item Weight: 1.7 pounds
Screen Size: 12 inches
Size: Large
Material Type: Plastic
Frame Material: Plastic
Color: Black/Glow in Dark
Style Name: Contemporary
Room Type: Living Room
Shape: Round
Theme: Plain
Dial Color: Black
Brand Name: Sharp
Number of Items: 1
Unit Count: 1 Count
Manufacturer: SHARP
UPC: 049353007496
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Aug 9
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Color: Black / White
Size: Large
Update with video April 1, 2026: Video showing the second hand stopped. The background noise is not the clock but a pump 😅 Original: I have two of these Sharp Atomic clocks and honestly love them. I really hate resetting clocks for daylight savings (why is that even still a thing?) and these set themselves. I have two notes though. The first is that they tend to reset themselves in the middle of the night. I work nights, so looking up to find my clock spinning around like it's possessed is a little strange, even after several years. The other thing they both do is in the middle of the night, at the top of the hour like 1, 2, or 3 am, the second hand will stop at 12 for a few minutes. It still tracks minutes perfectly, but from :00 to :04 or so, the second hand is frozen at 12. I have no idea why they do this, couldn't find anything about it anywhere on Google. But, it resumes and keeps perfect time, so it's just an oddity. I'm pretty sensitive to ticking noises, and I cannot hear this clock tick unless my head is right next to it and the room is quiet. 15 feet away on the wall, I don't hear it at night at all, ever. It's a good size I can see across a fairly large room in my home (open floorplan), but isn't enormous or anything. Very simple, classic looking, easy to read clock face too. I'm poor and $40 is a lot for a wall clock. But I don't have to get out a ladder and reset the damn thing twice a year and I find that cost was absolutely worth it to me.
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Reviewed in the United States on February 17, 2026 by Aura
Color: Black/Glow in Dark
Size: Large
Clock arrived today and I immediately went to set it up in my garage. Flipped it over, set the time zone switch, set the DST switch, and put the battery in. As soon as the battery went in, the hands started spinning. It cycled through a whole 12 hour rotation and stopped at 12 o'clock and sat there. I hung it up on the wall and it started ticking the time (of course it was the wrong time, but it was working.) After about 30 minutes hanging on the wall, it received the time signal from Fort Collins, Colorado (I'm in Tennessee near Nashville) and it immediately set itself to the correct time. The glowing numbers look really good once they receive light for a few minutes to charge them. My kids think it's cool.
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Reviewed in the United States on July 13, 2026 by BCF
Color: Silver / White
Size: 12
Update: I liked the first one so much, I ordered another one with a gray face! If there's one thing I love, it's a functional item that makes my life easier. I hate going around the house twice a year at Daylight Savings time to adjust clocks. This eliminates that! This one is easier than other atomic clocks I've had as well. I just inserted a AA battery, and a few minutes later the clock was synced to the exact time down to the second! What could be easier? It is the perfect size for my kitchen, and is very light so mounting was easy. The large numbers and split hands are both stylish and easy to see. In all, a great value!
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Reviewed in the United States on December 10, 2025 by Qwerty
Color: Silver / Grey
Size: Large
This was different. I read the helpful reviews here and when I got it, I put the battery in and watched it run it's hands around and land on the wrong time, so I put it in a southeast facing window and after about 4 hours, voila! Not exactly my phone time but close enough. It looked good on my wall and the time was close enough. And then it started getting dark... darkness is not a friend of this clock. With the black hands, the low light in my living room and the dark gray in the background of the clock, it's like...time flew....right out the window. I could not see what time it was from about 4:30 p.m. until I went ni-nite! And it was not that easy to see in the natural light of daytime! I packed it up and shipped it back. Got one that lights up when it starts getting dark and all is good now. But it's a good clock...
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Reviewed in the United States on November 15, 2024 by babygoatpuller
Color: Black / White
Size: Large
The Sharp "Atomic" clock works as advertised. It receives a time signal via radio from station WWVB at the NIST lab near Fort Collins, CO. A small computer chip in the clock decodes the time signal and uses it to set the hands of the clock. The clock operates silently -- no ticking noise. NIST is the National Institute of Standards and Technology, part of the Commerce Department. The user guide for the clock says that I might need to try positioning the clock on different walls to properly receive the time signal. This was the case for me -- I had the clock on an east-west wall to begin with, and it did not "sync" that first night. I moved the clock to a north-south wall and the second night it synced successfully. When I looked at it the next morning it was displaying the correct time to the second. The user guide also says that signal reception is best at night and that it might not receive a signal during the day. I found this to be the case, too -- the clock did not sync during the daytime. Note that this clock model supports only the four main US time zones: Eastern, Central, Mountain, and Pacific. You set a selector switch in the clock to one of these zones. You also set a switch to tell it to adjust for US Daylight Saving Time or not, depending on your area. If you can't describe your location using these two switches, the clock won't display the correct time. It's really just for US locations in those four time zones and US Daylight Saving Time rules. I recommend the clock if you are located within the area for which it's designed. I particularly like the silent (non-ticking) feature. That works perfectly, and it's the reason I picked this model instead of one of the others. If a clock's description doesn't specifically say that it operates silently, then it probably isn't silent. There's nothing wrong with ticking, it's entirely a user preference, but I wanted silent operation.
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Reviewed in the United States on June 2, 2025 by R. Simpson
Color: Silver / White
Size: 12
This thing is total garbage for any price, much less $40, and yes I followed all the instructions. I thought I was paying extra to get something with quality control. Boy was I wrong. When first given batteries, the hands spin for about 3 to 10 minutes to put all three pointed at 12. That works, all hands find 12, which tells me the hands are installed correctly. The clock does find the radio signal, because a few minutes after doing the startup "reset dance" to 12, it will start spinning again to set a different time. All pretty normal, it's using holes in internal cogs to figure out where the hands are. Problem is, it sets itself randomly from 3 hours to 2 hours 40 minutes late for every time zone it can select. If it's 12 Pacific time and you select Pacific time zone using the switch on the back, it sets itself randomly between 2:45 and 3:00. If you select Mountain time, it spins to 4:00 when it's actually supposed to be 1:15. Central, it'll go to 5:00 (when actually 2:15) and Eastern 6:00 (when it's actually 3:15). The minutes hand inaccuracy seems to randomly vary within a 20-minute range each time I tell it to re-synchronize with the radio signal, so you can't even just remember how far off the clock is and compensate. I found the hours hand can be spun on its fitting to fix the hours, which is in itself awful but at least helps fix it. Unfortunately even if I got the hours to set correctly from Fort Collins, that random 20-minute variance in the time setting means it's impossible to know how far off the clock is on any given day. The specs say the material is "Silver" which is usually an 'advertising lie' that means zinc, steel, chrome, or some kind of metal or metallic finish. Nope, all plastic with an ugly gray paint, and that plastic isn't even nice plastic. It feels like that soft bendy plastic they make Halloween pumpkin candy baskets out of. As I typed this out I tried using the 'Wave' button on the back one last time just to be sure. This forces the clock to reset and look for the radio signal again. It did the same thing as the four other tries. All hands go to 12, then it sits for a few minutes, then the hands start moving again. They spin up to the current time, then blow right past it and stop 3 hours in the future. Except this time the minute hand went to a time that's 15 minutes slow. Well, what if I just don't use the radio setting (that was the whole point of paying $40 for a clock)? Nope. Here's how you set it. There's one button you hold down, and while you're holding it down, the minute hand spins. It will only go forward, not backward. When you let go, it stops spinning. And then if it does detect the radio signal again, or whenever you have to change the battery, it will go back to the incorrect time. That means, * If your clock is 5 minutes fast and you want to correct that, you have to hold the Set button down for 10 minutes while the clock slowly spins through all 11 hours and 55 minutes. * If you overshoot that, you have to do it again. * If it ever hears the radio signal, it will reset to the incorrect time and you have to do it again. * If you change the batteries, you have to wait 10 minutes for it to spin to 12, wait 30 minutes for it to hear the radio signal, wait another 10 minutes for it to spin to the time it heard, and then hold the Set button for another 10 minutes to spin it manually, for a grand total of *it takes an ACTUAL HOUR to manually set this clock after changing batteries.* Whoever designed this clock is a sadist. Please, do yourself a favor and get something else. It's impossible to make a clock worse than this, so anything else you buy will be better.
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Reviewed in the United States on November 18, 2021 by Brian S.
Color: Black/Glow in Dark
Size: Large
Very happy with this clock. It does take a while for it to find the atomic signal and sync to the correct time but you just need to be patient. I have 2 of them in my house and they are both accurate. The glow is decent but if it's in an area with less light it obviously doesn't glow as well. The numbers are easy to read even at night. It is not a silent clock it does make a deep tick but it's not loud either. Overall a great clock and I would definitely buy more again in the future.
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Reviewed in the United States on May 6, 2026 by Ryan Mulloy
Color: Silver / White
Size: 12
FABULOUS!!! This is the BEST kitchen wall clock that I have ever had or seen!!!
Reviewed in the United States on July 27, 2026 by T V D