Toyota PRIUS Manual page 223

1-9. Safety information
Types of child restraints
Child restraint systems are classified into the following 5 groups
according to the regulation "ECE No.44".
Group 0: Up to 10 kg (22 lb.) (0 - 9 months) 1
+
Group 0 : Up to 13 kg (28 lb.) (0 - 2 years)
Group I: 9 to 18 kg (20 to 39 lb.) (9 months - 4 years)
Group II: 15 to 25 kg (34 to 55 lb.) (4 years - 7 years)
Group III: 22 to 36 kg (49 to 79 lb.) (6 years - 12 years)
In this owner's manual, the following popular 3 types of child restraint
systems that can be secured with the seat belts are explained.
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PRIUS PHV_OM_OM47831E_(EE)