OPTIONAL BATTERY BACKUP - This clock is electric operated; the battery backup (2 x AAA - Not Included) 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, but alarm and time settings are retained, and the alarm will still sound. Once the power is restored the display will re-light. EASY TO READ ILLUMINATED BRIGHT RED LED DIGITS - Easy to Read Red .07” Numbers on the clock are very clear. See from across the room or even without glasses in the middle of the night!. SIMPLE TO OPERATE DIGITAL ALARM CLOCK – This Sharp clock has been designed with absolute simplicity in mind and is very easy to operate. Perfect for adults, children, teens, seniors and the elderly. DUAL ALARMS WITH 9 MINUTE SNOOZE - The digital alarm clock provides two separate alarm settings, giving you the option of waking up at two different times. Features a beep alarm to wake you up, with a 9-miunte snooze function if you need a little extra sleep. SUPER FAST CHARGING - No need to buy two types of adapters to charge your phones. This digital alarm clock features flexibility with both a USB Type-C and standard USB Type-A charge port. The USB Type-C port provides super-fast charging perfectly compatible with the new iPhone 15, Galaxy or smart phone. There is also a USB-A port that delivers 2 AMPs of fast charging power. The perfect combination to charge all your devices, quickly and efficiently.