You can activate a feature that flashes the screen backlight alongside the alarm or timer beeps. On the main timekeeping screen, press and hold the Start/Stop (D) button for about 2 seconds until the small flash icon appears on the display.
Press on the main alarm screen to toggle the daily alarm and the hourly time signal on or off. 2. Countdown Timer Mode
While any digit is flashing, pressing the Top Right (B) button toggles between regular 12-hour and 24-hour (military) time formats.
Press when the timer is paused to reset it back to its starting time. 3. Stopwatch Mode Press Start/Stop (D) to start the stopwatch. Press Start/Stop (D) again to pause the stopwatch.
Press the Mode (C) button to cycle through the settings in this order: Seconds → Hour → Minutes → Year → Month → Day.