Big-Display 999-Day Countdown Timer

Physical specs: approx. 15.5 cm wide × 5.7 cm tall × 1.1 cm deep; constructed from durable ABS plastic. Screen measures 13.8 cm × 4 cm (5.4 × 1.6 in), offering high-contrast digital readability. Powered by two pre-installed CR2032 coin cells. Includes both clock and countdown functions, with user-selectable 12-hour or 24-hour time format. Countdown range extends up to 999 days, 23 hours, 59 minutes and 59 seconds. Triggers a 60-second alert tone at zero. Setup is fully manual and immediate: press and hold CLOCK to enter time-setting mode, then adjust hour → minute → second sequentially; press CLOCK repeatedly to advance between fields. For countdown, hold SET to begin editing — cycle through days/hours/minutes/seconds using SET, then adjust values with UP/START or DOWN. Designed for practical UK/EU use cases: tracking A-level or undergraduate degree timelines, NHS maternity dates, lab experiment durations, kitchen fermentation windows, retirement countdowns, or corporate quarter-end milestones — all requiring dependable, battery-powered, wall- or surface-mountable timing without Wi-Fi dependency or app setup.