Large Digital Display and Mirror Surface: The classroom timer features a large 4" LED display with a constant backlight. Not only can you clearly see the various functions on the screen from a distance, but you can also apply makeup up close thanks to the mirror surface. Multiple Positioning and Time Management: The timer has a magnetic design, a back stand, and a hanging hole to meet your various needs. It can be used as a cooking timer, fitness timer, kitchen timer, and helps those who need to manage their time to better organize their day. Easy to Use and Memory Function: The digital kitchen timer is designed with 4 basic buttons for uncomplicated use. It will remember your last countdown or cumulative time, so you won't have to set the time again unless you reset it. Adjustable Alarm and Digital Flashing Function: There are 3 volume levels, 80-90dB. 60-70dB and silent mode, so you can easily hear the alarm in the next room when using the highest volume. In silent mode, the flashing numbers will gently remind you not to disturb others in public places such as libraries, classrooms, or offices. Energy saving: Powered by 3 AAA batteries (not included). If the timer malfunctions, the screen brightness will dim and then turn off within a few seconds. Don't worry, it consumes no power in standby mode.