The design of this alarm clock is to use a power cord (5-volt) as the primary power source.
Replacement Power Cord: Look on the back of the clock for the appropriate Power cord number. It is important to use the correct power cord on all electronic devices.
The backlight will operate at five levels of intensity (including OFF) at your discretion when using the power cable.
The Projection will operate at three levels of intensity (including OFF) at your discretion when using the power cable.
Settings Backup: Your alarm clock has a capacitor that will keep settings for 6 minutes in the event it loses power. Time will not display when unplugged.