Sharper Image SN005 Instructions Manual page 13

Auto Synchronization
Once you have found the optimal position, leave the
watch still so that it can receive a clear signal. It normally
takes 3 to 10 minutes to synchronize. Once it is success-
ful, the watch displays extremely accurate time and the
correct date. A successfully synchronized watch features
a non-blinking antenna icon and a radiating beacon. (See
Figure .) The synchronized watch attempts to refresh
itself with the radio time signal at least once a day. If it
fails for more than 3 days, the antenna icon disappears.
The watch still functions as a quartz watch until it can be
refreshed again.
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