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MARATHON Slim Jumbo Atomic Wall Clock, Graphite Gray - Large 15-Inch Full Calendar Display, AM/PM or 24-Hour Time Format, 7 Time Zones, Indoor Temperature & Humidity - Four AA Batteries Included

  • Based on 2,173 reviews
Condition: New
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Availability: Only 10 left in stock, order soon!
Fulfilled by Amazon

Arrives Wednesday, May 22
Order within 21 hours and 32 minutes
Available payment plans shown during checkout

Color: Graphite Grey


Features

  • SELF-SETTING, SELF-ADJUSTING CLOCK - Simply insert the batteries provided & the Marathon Slim Jumbo Atomic Wall Clock will synchronize to the correct time using radio frequencies from NISTs Colorado Atomic Clock (only functions in N. America).
  • LARGE DISPLAY - Our easy-to-read, 15-inch display and the sleek, contemporary design make this beautiful clock ideal for your home, office, school, or church. Easily hang it on the wall or place it on a table using the sturdy, fold-out stand.
  • MULTIPLE MODES - Choose the display that best suits your lifestyle: AM/PM or 24-hour time format; a full weekday readout, perfect for planning & organization; or the indoor/outdoor temperature in Celsius or Fahrenheit.
  • SEVEN TIME ZONES - This clock includes seven North American time zones: Pacific, Mountain, Central, Eastern, Atlantic, Alaska, and Hawaii standard time.
  • MARATHON - A family company that has been producing timing instruments for over 80 years. Our uncompromising quest for technical excellence allows us to produce the most advanced clock systems with the experience that our long tradition offers.

Brand: MARATHON


Color: Graphite Grey


Display Type: Digital


Style: Contemporary


Product Dimensions: 14.5"W x 9"H


Age Range (Description): Adult


Room Type: Home Office


Shape: Rectangular


Indoor/Outdoor Usage: Outdoor, Indoor


Theme: Contemporary


Display Type: Digital


Room Type: Home Office


Indoor/Outdoor Usage: Outdoor, Indoor


Are Batteries Included: Yes


Mounting Type: Wall Mount


Number of Batteries: 4 AA batteries required. (included)


Operation Mode: Atomic


Color: Graphite Grey


Style: Contemporary


Shape: Rectangular


Theme: Contemporary


Brand: MARATHON


Age Range (Description): Adult


Target Gender: Unisex


Product Dimensions: 14.5"W x 9"H


Item Weight: 34.08 Ounces


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, May 22

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.

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Top Amazon Reviews


  • Set up is a little complicated, but with patience, it works fine in the end!
Color: Walnut Finish
Don't panic if it doesn't pick up a signal right away! I read the fine print carefully, and it says to allow 24 hours for it to find a signal... So I left it over night, and by the morning it had picked up the signal! Mind you, one thing to note: - it automatically came on with "Daylight Savings Time" mode on, and was an hour ahead. So, I had to get my tech-savvy daughter to help me change this mode. The instructions for changing the MODE are not very clear. If yours comes on with "Daylight Savings Time", (and is an hour wrong), do not change the time - just change the MODE - i.e. toggle OFF the "Daylight Savings Time". As soon as you toggle it off, the time will correct itself! So, once you get over the initial hurdles of setting it up, it's a great clock! Looks very nice on the wall, nice walnut frame, super large numbers make it easy to read from a distance, and I love seeing the temp and humidity. One other thing to note - it doesn't light up at night, so unless you have a light on in the room, you won't see it in the dark. (One teeny disappointing thing, but it's not a big deal). Over all, very satisfied with this unique clock! ... show more
Reviewed in the United States on August 9, 2019 by Toria Burrell

  • Nice Price Point for a Large Format Clock--esp if you hate shifting the hours on daylight savings (coming up 11/6/2016)
Color: Black
UPDATE: After 48 hours, the time has finally adjusted properly. All is great! Pic 1: After 24 hours, the time had not set properly--the time zone was not correct (it says "E" instead of "P"). In this pic you can see the dimension (clock is 9 inches high, and the time letters take up 4.5 inches of that) Pic 2: After 48 hours, with some nice hand holding from support at Marathon, the clock did set itself properly. I've taken a pic with one of the jumbo clocks we own. Pic 3: It FEELS slimmer, but is it? Here is a pic of the slim and the jumbo from the edge angle. (It's only slightly slimmer, but somehow it feels a lot slimmer than it really is) *** I own five Marathon clocks. Most of them Jumbo sized. My favorite configuration is just like this slim one: time in huge letters (with seconds), temperature, date, AND humidity. it can get very dry in higher altitude, and it's nice to have a reminder to turn on the humidifier in my bedroom. overall, the best thing is marathon is a good company. they've been making nice, atomic clocks for awhile. after purchasing from amazon, they send a follow up email--and this time, i actually wrote back to let them know the atomic signal has not set the clock after 24 hours. they referred me to an actual person with a phone number--and he and i were chatting in a few minutes. he was very reassuring, and sure enough--after another day with the clock near a window, everything set properly. the ONLY time i had to return a clock was when I bought a jumbo marathon for hawaii. let it be known, that clock signals from colorado do not reach hawaii. :) as for the product, i love marathon's large number, atomic clocks. mainly, i used to hate dismounting every clock in the house twice a year when the time changes happened. so this solved that issue. the only thing that had been holding me back from buying more is the high price point of the jumbo (~$80). so when i saw the slim-jumbo at $49.95, i dove in. some nice touches are the temperatures can be toggled F or C. and the dates come in two formats ("european" where the day comes first, or "american" where the month comes first). if you for some reason want to set the clock manually--just hold down the mode button in front, and use the snooze/alarm to increase or decrease things. i think you have to also use one of the button on the back (12/24) to change the East, Mountain, Pacific designations when that is blinking. i had hopes that the very light background would make this easier to see in my dark bedroom. this still has not improved--it's the same as the old jumbo. but the tech support guy did mention they're working on a backlit one... overall, this is a minimalist/functional looking clock and at a much more reasonable price compared to the jumbo. PS, i did not receive this product free, discounted, or as part of vine. i paid full price, i needed a clock like this, and i chose independently amongst many competitor options. ... show more
Reviewed in the United States on October 26, 2016 by Value Purchaser Value Purchaser

  • XL characters easier to read
Color: Grey Ash Finish
If you have not owned an atomic wall clock before you need to be patient with the setting and signal acquisition. My first one was about half this size and it worked for 15+ years before I gave it to my dentist office that had no clock. As my eyes aged I wanted larger digits. The choice of gray wood grain is odd as an only wood tone choice but I'm more concerned with function than appearance. The company making these clocks is large with a full product line of time pieces. Engineering seems to be good but a few locales may be blocked from the signal or have too much interference. It is easier for the clock to sync with the signal if you do some pre-setting of the year, time zone and approximate time. The price is steep but these things either work or they don't, and they last for decades. I value a humidity reading but it is too soon to comment on the accuracy of that feature. The temp seems to be accurate within one degree. Check batteries once a year when you change smoke alarm batteries to avoid damage by leaking. ... show more
Reviewed in the United States on December 19, 2020 by Jim Gordon

  • Just short of perfect
Color: Wood Finish
I love this clock. It’s large, simple, and easy to read. It looks great in our living room, BUT it doesn’t automatically change when daylight savings kicks in or ends like some others I own, and this is really annoying. Having to grab a chair to reach the clock twice a year to manually adjust the time is a deal breaker for me. I will enjoy it for the life of this clock but will not repurchase. ... show more
Reviewed in the United States on March 12, 2023 by Mighty Mouse

  • Great Purchase
Color: Black
Does what it says. Love the big font it gives out.
Reviewed in the United States on November 26, 2023 by JP Liautaud

  • It works well
Color: White
The instructions state that it will automatically set the time within one hour of power on, unless the radio signal from the synchronization station is weak. In my case it took overnight.
Reviewed in the United States on December 3, 2023 by Alyosha

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