Which is great if you're traveling or on-the-go since you can detach exactly the days you need.Press the ON / OFF button, the display will be AM, is the 12-hour clock,Then press the ON / OFF button, AM not, will show 00, is the 24-hour clockAt any time click the "MEMO" key issue "drop" soon after the first group to successfully set the alarm, the smart chip is to remember that time, after 24 hours at the same time, a rapid alarm sounds will ring for 30 seconds reminder.tones manually set has four, the first: "drop", the second: "Didi" .... Fourth: "bit by bit"Sound size is fixed and can not adjustIf the ring setting in turmoil, that all press MEMO key will cancel and re-set the fine. Or go to the next and then transferred to the battery to be.Product packaging:1 x Multi-Alarm Timer Pills Reminder (Not Including CR2025 battery battery)