My v1 is mounted high just below the sunvisor.
Today i went into a carpark which had a sign saying infrared motion detectors are installed for security.
All over the ceiling there were motion detectors and my V1 was alerting laser all the time. Out of curiousity, i turned my car around to see if it would light up the rear arrow instead of the front arrow but it did not alert at all.
Could it be my rear laser sensor is not working? Or just that the infrared light from the motion detector just did not go through my rear window, past my rear seats and into my detector?