Stay perfectly on time with this battery-operated atomic wall clock featuring automatic time synchronization and comprehensive indoor/outdoor climate monitoring. Designed for home and office use, this large digital wall clock combines precision timekeeping with real-time temperature and humidity display — all in one easy-to-read unit. Key Features Automatic Atomic Timekeeping: Built-in WWVB radio receiver syncs automatically with the US National Institute of Standards and Technology (NIST) signal from Fort Collins, Colorado — no manual setting required. Displays time in 12/24H format with seconds accuracy. 15" LCD High-Definition Display: Large 9.4-inch tall LCD screen with 4.5" digits for effortless readability from across the room. Simultaneously displays time, date, day of the week, alarm, and indoor/outdoor temperature and humidity. Wireless Outdoor Sensor Included: Transmits outdoor temperature and humidity readings up to 328 feet (100 meters). IPX4 waterproof-rated sensor is splash-resistant and suitable for outdoor placement away from direct rain. 8 US Time Zones Supported: Covers EST, CST, MST, PST, AKT, HST, AST, and NST — ideal for households and offices across the continental US, Alaska, and Hawaii. Versatile Mounting Options: Features 3 hanging holes and a built-in stand bracket — use as a wall clock or freestanding desk clock. Suits kitchens, living rooms, bedrooms, offices, and libraries. Battery Operated: Main unit requires 4 AA batteries; wireless outdoor sensor requires 2 AAA batteries (batteries not included). Note: For temperatures below -4°F, use lithium batteries in the outdoor sensor. Display Information The clock simultaneously shows: current time (12/24H), date, day of week, alarm status, indoor temperature and humidity, and outdoor temperature and humidity (°C or °F selectable). Senior-friendly design with large, high-contrast digits. Specifications Specification Details Product Dimensions 14.2"L x 1.2"W x 9.4"H Length 14.2 inches Width 1.2 inches Height 9.4 inches Package Dimensions 16.4" x 12.0" x 2.1" Display Size 15 inches (LCD) Digit Height 4.5 inches Color Options Black, Silvery Material Plastic housing with LCD display Power Source Battery operated (4 AA + 2 AAA, not included) Sensor Range Up to 328 feet (100 meters) Sensor Waterproof Rating IPX4 (splash-proof) Time Zones 8 US time zones (EST, CST, MST, PST, AKT, HST, AST, NST) Temperature Display °F / °C selectable Weight 2.69 lbs Model Number LWC100 What's Included 1× Atomic Clock, 1× Wireless Outdoor Sensor, 1× Manual Ideal For This large digital wall clock is perfect for seniors, home offices, kitchens, living rooms, bedrooms, and libraries. Makes an excellent gift for birthdays, holidays, Thanksgiving, Christmas, and anniversaries.