The chicco isofix autofix car seat base is a group 0 isofix base and is specifcally designed to ensure the auto fix car seat reaches the highest possible levels of excellence as far as safety and user friendliness is concerned the base can only be used with the chicco auto fix fast car seat sold with the chicco trio living travel systems the base can be easily fitted to the seat in your car using the isofix connectors and the support foot acts as the third anchor point the car seat is basic