This compatible with Sharp Digital Alarm Clock offers easily accessible top button controls. Want to pause the alarm for a few more minutes of sleep Press the snooze button right from your bedside. Need to turn off the alarm in a flash Simply flip the alarm switch to OFF at the top of the alarm clock. This clock is electric operated; the battery backup does not power the clock. The battery backup is used for storing the time and alarm settings if the power is interrupted. During battery backup the clock's display will not be lit. Once the power is restored the display will re-light. Check the time to make sure it is accurate and adjust if necessary. Product Dimensions: 4.63 x 1.95 x 2.8 Easy to Read LED Display Easy to Access Top Button Controls 9 Minute Snooze Battery Back-up – requires 1 x 9V battery (not included) Product dimensions (4.63” x 1.95” x 2.8”)No assembly required