Digital Triple Timer & Clock: Triple Count down timer. Alarm. Count Up function. 12/24 hr clock. 2 display options: Triple 20 hour countdown timer which can run simultaneously, with 12/24 hour clock. Count Up Timer 99 hours, 59 minutes, 59 seconds. Count Down Timer offers 3 sets - 99 hours, 59 minutes & 59 seconds. The alarm will sound for 1 minute when set time has been reached. Choice of desk stand or magnetic back.