COMPACT SIZE - Measuring 3.14" x 3.14" x 1.6", powered by 1 AA battery, it is perfect for use as a desk/bedside/bedside table wake-up clock and also a travel alarm clock. COMPLETELY SILENT - Super quiet and clean designed alarm clock with no annoying ticks, perfect for those who need full silence to fall asleep. Snooze and Light Functions - Snooze and Light buttons are located at the top for easy to find. Press and hold the button for 5 minutes to snooze or light up the clock face on demand for instant dial visibility in the dark. Runs on 1 "AA" battery (not included). Service: If you have any questions about our products, please feel free to contact us, we will try our best to find a satisfactory solution for you within 24 hours