Britax Safe N Sound Compaq MKII Instructions For Installation & Use page 20

SHOULDER HEIGHT MARKERS
IMPORTANT: Follow this advice.
The child restraint is unsuitable for the occupant when the shoulders are above the upper height marker
label. The child needs to be moved into the next form of child restraint.
Marker A: LOWER SHOULDER HEIGHT MARKER
When the child's shoulders
reach the lower marker, the child
restraint may be turned to face
towards the front of the vehicle
or move the child to another
forward facing seat with in built
harness. At least 12 months
of age. Britax recommends to
maintain rearward facing for
as long as possible until the
shoulders reach marker B.
Marker B: MIDDLE SHOULDER HEIGHT MARKER
When the child's shoulders
reach this marker, the seat must
be moved into forward facing
mode. Approximately 2 to 3
years of age.
Marker C: UPPER SHOULDER HEIGHT MARKER
When the child's shoulders
reach this upper marker, the
child is now too big for the
child restraint. It is now time
to move to the next child
restraint. Approximately 4
years of age.
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Instructions for Installation & Use