La Crosse Technology atomic 12" analog wall clock — Black frame, WWVB self-setting, 4 time zones

The La Crosse Technology WT-3129B is a 12-inch self-setting atomic analog wall clock that automatically syncs to the national WWVB time signal for accurate, maintenance-free timekeeping.

This classic black-framed analog clock blends easy readability with automated precision. Designed to receive the WWVB radio time signal from Fort Collins, CO, the WT-3129B sets itself to the correct time, updates for Daylight Saving Time (optional), and offers four adjustable time-zone settings. Its large, matte black frame and silver bezel make it a versatile choice for home, office, or classroom walls.

How does the atomic sync keep time accurate?

The WT-3129B listens for the WWVB radio transmission and adjusts the hands automatically when it receives a clear signal. If you are outside the signal range, a manual reset is available, and the clock will maintain accurate time using its internal quartz movement.

• Automatic daily synchronization with WWVB (when in range)
• Manual reset button for quick re-sync or signal limitations
• Accurate to the second via radio-controlled updates

What power options and battery life can I expect?

Operation requires one AA alkaline battery for normal function; the unit also includes an extra battery compartment that holds two additional AA batteries to extend runtime. With three good quality AA cells installed, La Crosse Technology rates the clock’s battery life up to five years under typical use.

• Primary operation with a single AA alkaline battery
• Auxiliary compartment accepts two more AA batteries for extended life
• Rated up to 5 years total battery longevity with three quality AA cells

How do I set the right time zone and Daylight Saving preference?

Setting time zone is handled by a simple slide switch with four options—PT, MT, CT, and ET—so you can match the clock to your region quickly. Daylight Saving Time updates are automatic by default, but an on/off option allows you to disable DST if you live in an area that does not observe it.

• Simple-set four-position switch for PT, MT, CT, ET
• Automatic DST updates with selectable on/off control
• Clear instructions and labeling ease setup in minutes

What design features make this clock easy to read and install?

The 12-inch dial offers large numerals and a clean, uncluttered face that’s visible from a distance. A durable plastic frame with a matte finish and silver bezel gives the WT-3129B a refined look while keeping it lightweight for straightforward wall mounting.

• 12-inch diameter for strong legibility across rooms
• Matte black wide frame with silver bezel for modern styling
• Lightweight design for easy hanging and repositioning

Who is this for? The La Crosse Technology WT-3129B is ideal for anyone who wants dependable, hands-off timekeeping—homeowners stocking common living areas, teachers equipping classrooms, office managers updating meeting spaces, and renters who prefer a plug-and-play solution. If you value accuracy, low maintenance, and a timeless analog look, this clock delivers straightforward setup and years of reliable service.