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B. Circular video: The default is 1 minute. This
function includes 4 options, namely, off, 1
minute, 3 minutes and 5 minutes.
C. Infrared light setting: it can set the infrared
light switch mode of the front lens and the car
lens respectively, which can set automatic, on
and off. The infrared mode of the front lens is
off by default, and the infrared mode of the car
lens is automatic by default.