SILENT ALARM: The silent quartz movement guarantees no ticking, ideal for those who need complete silence to fall asleep. Clock size: 8 x 8 x 4 cm (3.1 * 3.1 * 1.5 inch), compact and portable for travel. SNOOZE AND NIGHTLIGHT FUNCTION: the snooze/nightlight button on the top of the alarm clock analog has dual function: one is to turn off the ringing alarm and get 5 minutes snooze; the other is to turn on the night light in the upper right corner of the clock face. The yellow light is soft and non-invasive, making it easy to check the time in the dark. CLEAR DIAL DISPLAY: A large display with bold hour digits makes the alarm clock clear and easy to read. Luminous hands help determine the position of the alarm at night and allow the user to more easily identify the time. GRADUALLY INCREASING ALARMS: The classic beep alarm clock has four volume rhythm levels. It fades out slowly and gets faster and louder until you turn off the alarm or hit the snooze button. The rising volume allows you to wake up naturally without being frightened by the sudden ringing of the alarm clock. EASY TO SET: An alarm switch and 2 buttons are visible on the back of the alarm clock. One button is for setting the alarm and the other is for setting the time. Battery Information: 1 x AA battery (not included). Tips: High quality carbon batteries are recommended instead of strong alkaline batteries or rechargeable batteries.