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WALLPAPER
Use this ICON to change the desired background image on the screen to change.
If the user has a custom image, it must first be loaded onto a microSD card with a
resolution of 720*480 and saved as a .BMP file. Then press the USER icon on the
bottom of the page to access the custom image files on the card, and select from
available images.
NOTE
The microSD card must be present at all times for continuous use.