4 groups clock timer

4 groups timer digital timer digital timer clock 1. 4 groups bell ring timer,count down time, count up time and clock function. 2. 4 groups bell ring timers can be set at the same time. The max countdown time reaches 99hours 59minutes59seconds. 3. It will ring for 60 seconds when it reach the time you set or reach "O0:00". 4. It can be used in kitchen, school,lab,ect. 5. Big and clear LCD display; 6.It has magnet, kickstand and hole on the back that make it both desktop or wall.