Long countdown timer setting: up to 999 days, 23 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 time format selection. Simple and intuitive operation. Versatile placement options: integrated magnet back and adjustable stand. Ideal for vacations, weddings, retirement celebrations, meetings, study sessions, and more. Clock setup instructions: - Press and hold the CLOCK button until the hour digits flash. - Use UP/START or DOWN buttons to adjust the hour. - Press CLOCK again to move to minutes, then seconds. - Press CLOCK once more to confirm and start the clock. - In CLOCK mode, press DOWN to toggle between 12-hour and 24-hour format. Countdown setup instructions: - Press and hold the SET button until a digit flashes. - Press SET repeatedly to navigate between days, hours, minutes, and seconds. - Use UP/START or DOWN to adjust each value; hold to increase/decrease rapidly. - Press SET again when done to save settings. - Press UP/START to start or pause countdown. - Press and hold UP/START 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.