STAY-IN-CAR BASE – Conveniently transfer Chicco infant car seat from vehicle-to-vehicle with an additional infant car seat base. Intuitive, click-in attachment compatible with all Chicco KeyFit, KeyFit 30, KeyFit 35 and KeyFit Max Infant Car Seats (sold separately) LATCH-EQUIPPED BASE – Force-multiplying SuperCinch LATCH tightener helps achieve a secure fit of baby seat with a fraction of the effort MAXIMIZED REAR-FACING USE – Integrated anti-rebound bar provides added stability and extended rear-facing legroom to comfortably maximize rear-facing use EASY-TO-INSTALL – ReclineSure spring-loaded leveling foot works in tandem with RideRight bubble level-indicators to verify proper base angle VEHICLE SEAT PROTECTION – A smooth underside on the baby car seat base helps protect vehicle seat from damage