Long countdown timer setting: up to 999 hours, 59 minutes, and 59 seconds. Upgraded design 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 selection. Easy-to-use interface with intuitive button controls. Dual placement options: magnetic back and adjustable stand. Versatile use: vacation, wedding, baby announcements, retirement, meetings, study sessions, and more. Clock Setup: - Press and hold the CLOCK button until the hour digits flash. - Use UP or DOWN buttons to adjust the hour. - Press CLOCK again to move to minutes, then seconds. - Press CLOCK once more to confirm and exit setup. - In clock mode, press DOWN to toggle between 12-hour and 24-hour display. Countdown Setup: - Press and hold the SET button until a digit flashes. - Use UP or DOWN to adjust the selected digit. - Press SET repeatedly to cycle through hours, minutes, and seconds. - Release SET when all values are set. - Press UP to start or pause countdown. - Press and hold UP and DOWN simultaneously to reset to zero. Power: 2 x CR2032 batteries included. Color: Black. 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 lighting and screen settings. Measurement tolerance: ±1–3 cm.