Maxi-Cosi FamilyFix 3 i-Size, ISOFIX installation. The Maxi-Cosi FamilyFix 3 base station offers the highest transport safety, allowing children to travel rear-facing in the car from birth up to approximately 4 years of age. The FamilyFix 3 base station is part of the 3wayFamily concept and ensures that the Jade carrycot, Coral, Pebble Plus, or Pearl Pro i-Size car seat are securely anchored in the vehicle. All three seats comply with the i-Size (R129) regulation, providing maximum safety. The FamilyFix 3 base station is very user-friendly, as the car seat can be easily installed in the vehicle using the Click&Go system thanks to ISOFIX. A visual and acoustic signal confirms the secure installation.