Sharp 12-Inch Atomic Wall Clock — Black Frame, WWVB-Synchronized with Glow-in-the-Dark Hands

The Sharp 12-inch Atomic Wall Clock is a battery-powered, WWVB-synchronized timepiece with glow-in-the-dark hands and numerals for clear day-and-night readability.

This lightweight, modern wall clock combines automatic radio-controlled accuracy with luminous hands and numbers so you don’t have to reset it or squint in low light. It receives daily time updates from the U.S. NIST WWVB signal, adjusts for Daylight Saving Time automatically, and requires a single AA battery (not included). The simple black frame and uncluttered face suit kitchens, offices, classrooms, and living spaces where dependable timekeeping matters.

How reliable is the clock’s atomic timekeeping?

The clock contains a receiver that picks up the WWVB radio signal from the National Institute of Standards and Technology (NIST), keeping the display accurate to within one second. It synchronizes daily and resets itself as needed, including automatic DST adjustments where applicable.

• Daily automatic synchronization with NIST WWVB broadcasts
• Accuracy within one second of the U.S. atomic clock
• Automatic Daylight Saving Time updates
• No manual time setting required after initial placement

Will the glow-in-the-dark feature work for my room at night?

The luminous hands and numerals store light energy when exposed to bright light; for the best glow, place the clock in sunlight or bright indoor light for 24–48 hours after first receiving it. Routine exposure to room or daylight will maintain nighttime visibility without electricity.

• Initial 24–48 hour light exposure recommended for full glow
• Bright window light or overhead lighting recharges the luminescent pigments
• Glows at night to show time without power or backlight
• Works well in bedrooms, hallways, and offices for low-light time checks

What are the size, power, and design details I should know?

This model measures 12 inches across, featuring a slim black frame and large, easy-to-read numerals. It runs on a single AA battery (not included) and is designed for wall mounting, blending utility with a clean, modern look.

• 12-inch diameter fits standard wall spaces
• Black frame with high-contrast numerals and hands
• Battery operated: requires 1 × AA (not included)
• Simple mounting point on the rear for secure hanging

How easy is it to install and maintain?

Installation is straightforward—hang it on a single screw or nail and insert the AA battery to start the automatic synchronization process. Minimal upkeep is required: occasional battery replacement and periodic exposure to light keep the glow function effective.

• Hang on one screw or nail; battery activates sync
• Low maintenance—replace AA battery as needed
• Routine light exposure preserves luminescence
• No wiring or professional installation required

Who this clock is for: The Sharp 12-Inch Atomic Wall Clock suits anyone who wants accurate, low-effort timekeeping with night readability—homeowners, teachers, office managers, and renters who prefer a classic analog display that stays current without manual adjustments. If you need dependable daily accuracy, easy wall mounting, and a glow-at-night comfort, this model provides a practical, unobtrusive solution.