The Zapp Xtra Multi-Model Adapter (sold separately) was specifically designed and tested for the following car seats: Safety 1st® Onboard series*, Maxi-Cosi® Cosi35, Graco® Snugride® 22**, Graco® Snugride® 32** and Graco® Snugride® 35**, Chicco® Keyfit™ 22, Combi® Shuttle™ 33, and the Britax® Chaperone®.

*Multi-model adapters are not compatible with the Safety 1^st® Onboard 22 car seats.
**Multi-model adapters are not compatible with the Graco^® Snugride^® ClickConnect car seats.