Kustom Signals Pro-Lite Reference Manual page 19

Equivalent performance should be obtained whether
operating in bright daylight or in darkness.
To obtain maximum operating range at the setup
location, the instrument should ideally be positioned so
that it is not operating through any glass in the patrol
vehicle. The oblique angles of most windshields often
reduce the effective range of the system and some
windshields are treated with a coating that blocks the
infrared emissions, making operation impossible. While it
is possible to operate the unit through most windshields, it
is preferred to operate the unit through the side glass,
although this may also result in some loss of range
performance. Speed accuracy is not affected by windshield
or side glass, only targeting range.
Due to the extremely narrow beam width of the Pro-Lite
that makes precise target identification possible, it may be
difficult to aim at long ranges if operated handheld. For
those situations, using a monopod or tripod to assist in
stabilizing the instrument is helpful. Using the unit
handheld or with a monopod or tripod are standard,
normal operating modes. The unit may be rested on the
patrol vehicle for additional support if necessary for
stability. If the vibration of the patrol vehicle is too great,
the Pro-Lite will not display a speed reading.
Pro-Lite Operator's Manual
Page 13