Volume adjustmentThis timer has 3 volume levels: silent, medium (65db) and loud (95db). Slide the button on the right side to adjust the volume. The silent mode is suitable for office, library, exam, etc. With Clock and Alarm FunctionLong press the [ST/SP] button, the multi-function timer can be switched to time mode. It is a clock on your desk, and it is also considered an alarm clock, in time mode you can set an alarm time. Easy and quick settingWith the three buttons [H][M][S], you can set the time, and with a long press the value is also quickly increased. If you want to reset it, you should press the [H] and [M] buttons at the same time. 3 ways to placeThe magnet with anti-slip pads on the back allows it to be placed on your fridge; open and attach the holder and place it on the table; there is also a hole for lanyard, which can be hung on the wall with a cord. Long working time: there are 2 AAA batteries. Thanks to the low power consumption, the timer can work with 2 batteries for up to 6 months or longer. If the timer shows 88:88 88, the batteries should be changed. To do this, you should first open the fold-out stand and then open the battery cover.