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How the parking monitor function works?
If you set the parking guard to ON, there are two different situations
after the parking guard is triggered: ① if the camera remains
connected to the power source even after turn off the engine (such
as you connect it to the power bank with USB cable or you have
hardwired your M2 dash cam), the dash cam is continues recording
under this situation; if you turn off the dash cam manually (long press
the POWER button) after parking, the dash cam will automatically
power on the and start to record a 30s emergency video when it
detect collision and shakes, and the dash cam will be continues
recording after the 30s emergency video (Emergency video will be
locked).②if the dash cam does not connect to any external power, it
will automatically shut off after you turn off the engine. At that time