Joie Duallo Manuel D'instructions page 5

Assemble Lower Back Support
see images -
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1.To attach the backrest to the
booster seat, hook the backrest
over the seat bar hinge on the
booster seat.
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!
Make sure that no part of the
seat covering interferes when
attaching backrest to the
booster seat.
2. Rotate the backrest up while
holding the booster seat until it
clicks into an upright position.
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2
!
IT IS NOT ALLOWED to use the booster base separately!
Approval according to ECE R44 has only been granted in
conjunction with the backrest.
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