1. 4 groups countdown: up to 99 hr 59 min 59 sec.
2. Clock: display hour, minute, second, 12/24hr.
3. 4 groups count up: up to 99 hr 59 min 59 sec.
4. This timer will alarm for a minute after the end of countdown.
5. There are 10 buttons and easy to use.
6. Can hang it on the wall, take it on the table,
    be attached onto the metal surface.
7. Power：2 X AAA batteries.