404-18027 18 in Atomic Clock
404-18027 18 in Atomic Clock
404-18027 indoor/outdoor design
404-18027 18 in Atomic Clock
404-18027 Outdoor
404-18027 5 year battery life option
404-18027 Frame, gauges dial design
404-18027 Dimensions
404-89027 18-inch Indoor/Outdoor Atomic Wall Clock

404-18027 18-inch Indoor/Outdoor Atomic Wall Clock

SKU: 404-18027

Regular price$79.99

Designed in La Crosse, WI, this 18-inch Atomic Wall Clock features a distinctive soft linen texture background, premium black metal hands, and easy-to-use controls, all wrapped in a stylish frame with a brushed taupe finish. Its durable, weather-resistant construction allows for placement indoors or outdoors for comfortable viewing of your time, temperature, and humidity values. With accurate atomic time reception and an impressive 5-year battery life, this 18-inch Atomic Wall Clock will surely be an attractive yet practical addition to your indoor or outdoor space.


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  • Automatically Sets the Time
    Syncs with the WWVB Radio Signal to Provide Accurate Time
  • Updates for Daylight Saving Time (On/Off)
  • 4 U.S. Time Zone Choices
    (Pacific, Mountain, Central, Eastern)
  • Learn more about Atomic Time HERE


  • 18-inch Diameter
  • Durable Indoor/Outdoor Construction
  • UV and Weather Resistant Glass Lens
  • Stylish Brushed Taupe Finish Plastic Frame
  • Soft Linen Textured Background with Black Numbers
  • Premium Black Metal Hands (Hour and Minute)
  • Single Wall Hanging Hole
  • Temperature Gauge (°F)
  • Humidity Gauge (%RH)
  • Easy-to-Use Controls
  • Impressive 5-Year Battery Life
  • Atomic Time Sets Itself with Manual Set Option


    • Printed Setup Guide Included
    • Access to U.S. Based Tech Support  · Educational Wall Clock Setup Video
    • 1-Year Warranty
    • 30-Day Money Back Guarantee on LaCrosseTechnology.com Purchases



  • Atomic Time Zones: Pacific, Mountain, Central, Eastern 
  • Temperature Range: -20°F to 120°F
  • Humidity Range: 1% to 99% RH
  • Power Requirements: 1 “AA” Alkaline Battery (Not Included)
  • Extended Battery: 2 Optional “AA” Alkaline Batteries (Not Included)  
  • Battery Life: 12+ Months (1 Battery)
  • Extended Battery Life: 5 Years (3 Batteries)
  • Dimensions:  18 in (45.7 cm) Diameter 2.6 in (6.6 cm) Depth 


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 form 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.


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:


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