Feature:1. BACKLIGHT AND DISPLAY: With backlight function, press any button, the green backlight will be turned on. Large LCD digital display is easy to read2. TIME SETTING: You can view the set target time by pressing the Look key. Automatically calculate the countdown days, the countdown time setting range is 09999 days 23 hours 59 minutes 59 seconds3. SUPPORT RESET: Long press the clear key to clear the countdown data, very convenient for you to operate4. BUZZER REMINDER: After countdown, the buzzer will ring continuously for 1 minute. Press any key to close the reminder5. WIDE APPLICATION: Days countdown timer can be used for on board chronograph stopwatch, race car brush lap timerSpecification:Item Type: Days Countdown TimerShell Material: ABSDisplay Mode: LCDBatteries: 2 x AAA batteries(not include)Function Introduction: 1. Automatically calculate the countdown daysBy setting the current time and target time, the countdown time is automatically calculated. Setting range: 0-9999 days, 23 hours, 59 minutes, 59 seconds2. After the setting is completed, press the Enter key to confirm, and the LCD screen will display the countdown days and time3. Reset: Long press the clear button, the countdown data will be reset to zero.4. Reminder: After the countdown is over, the buzzer will sound continuously for 1 minute to remind, press any button to turn off the reminderApplication Range: Car chronograph stopwatch racing lap timerDisplay Size(LxW): Approx. 65 x 35mm / 2.56 x 1.38inProduct Size(LxW): Approx. 129 x 64mm / 5.08 x 2.52inUpper Thickness: Approx. 27mm / 1.06inLower Thickness: Approx. 44mm / 1.73in.Package List:1 x Days Countdown Timer4 x Accessories1 x User Manual