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404-1235UA-PL 14 inch UltrAtomic - Analog Wall Clock

SKU: 404-1235ua-pl

Regular price
The UltrAtomic Wall Clock is the only Atomic clock on the market that receives the new NIST broadcast, offering greatly improved reception and reliability. The advanced technology allows the signal to “break through” barriers like cement walls that previous versions could not, making this clock a great addition to any office complex, school or home.
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  • Barrier Resistant Signal
  • 24 Time Zone (world time)
  • Eco mode to extend battery life
  • Q-mode (Quartz mode) for manual time setting
  • UltrAtomic time with manual set option
  • Automatically updates for daylight saving time (on/off option)
  • 14" Stainless Steel Frame
  • Low power detection indicator
  • Plastic Lens

New UltrAtomic® Technology

La Crosse Technology is introducing a line of radio-controlled clocks based on its innovative UltrAtomic® technology, designed to receive the phase-modulated enhanced WWVB broadcast signal that NIST has recently introduced. This line of products is the first and only one in the market to be based on this enhanced broadcast, offering unparalleled reception. UltrAtomic clocks operate even in the harshest conditions, where the signal-to-noise ratio interferes with radio-controlled clock reception using the legacy AM signal broadcast.

UltrAtomic® technology digitally processes the received signal via an integrated circuit within the clock. It leverages the advanced modulation scheme and new data encoding. The reception reliability of the technology has been validated in the most challenging locations and scenarios, and has been demonstrated successfully throughout all of North America.

UltrAtomic® clocks allow you to select any time zone with a custom setting. Now you can enjoy UltrAtomic® accuracy, while view time zone around the world.

The new WWVB broadcast provided by the NIST includes a notification for the daylight savings time transitions well ahead of when they are to occur. The UltrAtomic® clock reads this information and, at the appropriate instance, automatically advances the hands one hour in the spring and eleven hours in the fall (to move back one hour), even if the signal is not received on the day of the transition.



  • Atomic Time
  • Plastic Lens
  • Q-mode (Quartz mode) for manual time setting

Power Requirements:

  • 2 or 4 "C" LR14 batteries (not included)
  • The movement features 2 additional battery compartments that allows you to add extra batteries (optional). This keeps the clock running for approximately 4 to 7 years before you need to replace the batteries.


  • 14" Diameter


La Crosse Technology, Ltd. provides, to the original purchaser, a 1-year limited time warranty (from date of purchase) on this product, relating to manufacturing defects in materials & workmanship. The item will be either repaired or replaced at La Crosse Technology's discretion.

Click Here for full warranty details

Use the registration link below to register ownership of your product only.  If you have a question about use of the unit, please click on the support tab next to this one to see available support material or submit a ticket.

Click Here to register your product


In this video we explain what a clock movement is, go over what "Atomic Time" means, and then demonstrate how to set up and use any of our four main wall clock movements. Use this video to learn how to set up a basic decorative wall clock, or one that uses the WWVB Atomic Radio Signal coming from Fort Collins, CO.

For more information on the NIST or the WWVB signal, visit:

For additional information about you wall clock, visit: