Digital alarm clock with a 0.6-inch Red LED display for easily checking the time at a glance Easy to See and Easy to Access Top Button Controls for simple use 9 Minute Snooze function AC powered with Battery Backup. Battery back-up 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. Backup requires 1 x 9V battery (Not Included) Clock Dimensions: 4.63” x 1.95” x 2.8” – The perfect size for a small and easy to use clock!