Cobra Digital 7750 PLT - Manual (Page 46)

8.6) Auto-brightness is not working properly
The 7750 PLT will adjust the display brightness based on the time of day.
Your unit will not know the local time until it locks onto satellites, therefore the auto-brightness
will not function until satellite lock is achieved.
You can also manually adjust the brightness as follows:
STEP 1 – Tap on the speaker icon in the lower-right
STEP 2 – Adjust the brightness
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