MULTI-FUNCTION COUNTDOWN TIMER: It can display 12/24 hours clok, days counting down, days counting up, you can set up to 999 days, 23 hours, 59 minutes and 59 seconds. EASY TO SET: It is easy to set the countdown or count up timer to your big days! Only take 1 minute with the included wireless remote. AUTO CALCULATION: Just input your starting and ending time the unit would automatically set the time for you, buzzer reminder when it arrives. No need to calculate time by yourself. EASY TO READ: LED numbers made for easy reading, Large enough to be easily seen haning on the wall or putting on the table, bright enough to be seen day or night. EVENT REMINDER: YZ 999 days countdown timer can provide various time setting modes to fulfill your count up/countdown needs for different events,retirement/baby/meeting/christmas/birthday/cruise/graduation/test/semester etc. YZ Digital 999 Days Countdown Timer, Count Up/Count Down Clock with Remote, 12/24 Hour Real Time, Event Countdown Clock Large Display, Countdown Calendar for Retirement/Pregnancy/Birthday/Christmas