With loud alarm ( minute, the beep sound differs per channel). It will start to count up when of the countdown time is reached. So you will know how long it has passed. It is useful when you are cooking. OCCASION -- cooking, classroom, laboratory, fitness, beauty, children eating, sports, meeting,etc. The maximum setting time is: 99 hours 59 minutes 59 seconds.Each timer has its own unique sound so you can tell which one is going off. Product Name: Digital Count Up Down Timer 3 Modes: clock + countdown timer + stopwatch 4 channel countdown timer.The 4 sets of give you some flexibility. It can be used at the same time when baking several different batches of something. It starts to count up at of your set countdown. to place the timer: Stand \/ Magnet \/ Hang. You can attach it on your fridge; Stand it up on your kitchen counter; or hang it . and clear digits display. Clock Mode: Press CLOCK button for about 2 seconds until the time starts to flash. Press \