Adjusting Headrest/Harness Height - Safety 1st Guide 65 User Manual
Convertible car seat rear-facing child restraint 5-40 lb (2.3-18 kg) and 19-40 in. (48-101.6 cm) /
forward-facing child restraint
22-65 lb (10.1-29 kg) and 29-49 in. (73.6-125 cm) and at least 1 year old