HP f505g Quick Start Manual page 12

When the LDWS is on, satellite positioning is
set, and the vehicle is moving at the set speed,
LDWS if the vehicle starts drifting out of the lane, the
camcorder will sound an alert, and a warning
image will be displayed as a reminder.
Once your car's location is determined by GPS
and the FCWS function is enabled, this product
produces voice and screen message alerts
FCWS
when you drive at speeds over 60 km/h (37
mile/h) and are less than 20m away from the
car in front of you.
When Headlight is activated, camcorder will
issue a voice alert and an alarm screen
Headlight Warning
reminding that insufficient brightness is sensed
on the recording face.
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