Fangrui Product Details [99 Hours Digital Timer]the 99 Hours 59 Minutes 59 Seconds Countup/countdown Timer Helps You Control Cooking Time Precisely During Long Baking Or Braising Dishes. It Also Helps Students To Set Long Periods Of Focused Revision To Efficient Revision. All Digits Turn Red When It Is Less Than 1 Minute Remaining, So You Not Miss Anything. Easy To Read 7.8 Inch Large Clear Led Display. [large Face Clock With Seconds]when Youre Not Using A Timer, You Can Use It As A Clock. Clock With Seconds Display Can The Accuracy Of Time. And It Allows You To Keep Time More Accurately. The Clock Also Allows You To Switch Between 12/24h Time Formats According To Your Reading Preference. Clock Mode Remains On Even When Unplugged, Making It Easy To Check The Time At Any Time [interval Time Management]use A Timer To Break Your Work Into 25 Or 30 Or 45 Minute Intervals With Short Breaks At 5 Or 10 Minutes(max 99rounds). This Help You Plan And Execute Your Time Better. [multiple Alarm Ringtones And Volume Options]the Timer Has 5 D