When 
flashes in the upper right corner of the display or the display dims, replace the batteries.
Cautions:
•Always remove old or weak batteries. Batter- ies can leak chemicals that can damage your system.
•Dispose of dead batteries promptly and properly; do not bury or burn them.
ADJUSTING THE DISPLAY CONTRAST
Note: You can adjust the display contrast only when the current time and date are showing.
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