Alarm and Silences Reminder: In loud mode, this timer can make a loud sound to remind you. In a particularly quite quiet environment, silent mode can be used without disturbing others, it will remind you with flashing red light. Support sleep mode: Press and hold the "start / stop" key for 3 seconds to turn off the machine. It can be reactivated by pressing any button. 1xAAA battery not included. Count Up/Count Down Function - Concise function. Reminder time up to 99 minutes and 59 seconds. Easy to Use: Clear LCD display with large digital number, easy to read the time. Small size and light weight, no burden even you carry it with you. Easy to use. Magnetic Back/Folding Stand/Hanging Hole - 3 METHOD to choose from when using in different conditions: Mounted on metal surface like fridge, stand on table or hang anywhere.