Day Countdown Clock: 13.7" x 3.9" LED screen with 1” red digits, visible up to 33 ft. Sturdy aluminum alloy frame ensures durability. Built-in buzzer with optional mute Easy Setup: Automatically calculates days between dates or lets you manually set a countdown/up timer (max: 999 days 23H 59M 59S). Simple operation, no manual calculations needed 4 Counting Modes: Supports count up, countdown, real-time clock, and stopwatch functions—ideal for various applications Reliable & Memory Function: High-precision chip prevents time drift. Plug-in powered with memory function to retain settings after power loss Versatile Use: Perfect for tracking events like holidays, retirement, safety days, workouts, and projects. Mount on walls, tables, or tripods (tripod sold separately Automatic calculation 999 Day Couner