b. We recommend the bottom of housing be set on the smooth flat and
closely seal with the surface.
c. When you mount the camera housing on the ceiling or wall, please use
the screws with the black rubber o-rings. Without the o-ring, the water may
seep into the machine.
d. Turn and loose the control stick, shift right and left to adjust the vari-focal
lens until the image becomes clear, then turn and tighten the stick to fix it.