Large digital display and mirror surface: The classroom timer is equipped with a large 4" LED display with a constant light function. Not only can you clearly see the different uses of the screen from a distance, but you can also make up close up through the mirror surface. Multiple placement and time management: The timer has a magnetic, back bracket and hanging hole design to suit your different needs. It can be used as a cooking timer, fitness timer, kitchen timer and helps those who need time management to better organise their day. EASY TO USE AND MEMORY FUNCTION: The digital kitchen timer is designed with 4 basic buttons so you can use it without complications. It will remember your last countdown or cumulative time, so you don't have to set the time again unless you reset it. Adjustable alarm and digital flashing function: There are 3 levels of volume, 80-90DB. 60-70DB and silent mode, so you can easily hear the alarm in the next room when you use the highest volume. In silent mode, the flashing numbers will kindly remind you that you will not disturb others in public places such as libraries, classrooms or offices. Energy saving: Powered by 3 AAA batteries (not included). If the timer does not operate in any way, the display brightness will dim and then turn off within a few seconds. Don't worry, in sleep mode it does not consume energy.