1.8" 9-Digit LED Countdown/Count-Up Clock with Remote Event Reminder & Countdown Timer: countdown clock has many features to . You can use it to countdown to your important events.A maximum day is 999days 23hours 59 minutes 59 seconds.Functions - 12/24 hours Normal time; Countdown/up in days with DDD HH:MM:SS; Stopwatch in hours minutes seconds hundredths of seconds New Design Remote - Easy to operate and set up. Turn on or turn off the sound. Turn on/off 10 seconds.Countdown event- Create a desire days hours minutes seconds then countdown to zero..Count up Day- Create a starting day hours minutes seconds(UP1) then create ending days hours minutes seconds(UP2) then start to count up from up1 value to up2..Ideal Event Timer- Useful to countdown a specific date like year Christmas day, retirement, project, Safety day, due date,accident day;Battery of remote is 2xAAA