Long countdown timer setting: up to 999 hours, 59 minutes, and 59 seconds. Upgraded version with larger LCD screen: 13.8 cm x 4 cm (5.4 in x 1.6 in). Audible alarm sounds for 60 seconds when countdown completes. Built-in clock function with 12-hour and 24-hour format toggle. Simple and intuitive operation. Two mounting options: built-in magnet back and adjustable stand. Versatile use: vacations, weddings, baby announcements, retirements, meetings, study sessions, and more. Clock Setup Instructions: - Press and hold CLOCK button until hour digits flash. - Press UP/START or DOWN to adjust the flashing value. - Press CLOCK repeatedly to cycle through hour → minute → second settings. - Press CLOCK again to confirm and start clock operation. - In clock mode, press DOWN to switch between 12-hour and 24-hour display. Countdown Setup Instructions: - Press and hold SET button until a digit flashes. - Press SET to move between digits (days, hours, minutes, seconds). - Press UP/START or DOWN to adjust the selected digit. - Press SET repeatedly until flashing stops to save settings. - Press UP/START to start or pause countdown. - Press and hold UP/START + DOWN simultaneously to reset countdown to zero. Power: 2 x CR2032 batteries (included). Color: White. Material: ABS plastic. Dimensions: Approximately 15.5 x 5.7 x 1.1 cm. Package Includes: - 1 x Digital timer clock Note: Actual product color may vary slightly due to screen settings and lighting conditions. Measurement tolerance: ±1–3 cm.