The Chicco Fit2 Infant & Toddler Car Seat Base is designed for use with the Fit2 Car Seat, a first-of-its-kind rear-facing car seat designed with two unique positions to accommodate infants and toddlers, making it easy to stay rear-facing for the first two years. A built-in stage-position lever lifts easily to convert the car seat base from Stage 1 to Stage 2 with one motion, creating extended leg room and more upright, spacious seating for growing toddlers. In Stage 1, the Fit2 functions like a traditional rear-facing infant car seat, offering more reclined seating with removable head and body support to accommodate newborns and smaller infants from birth to 12 months. In Stage 2, the Fit2 easily transitions into a rear-facing toddler car seat, offering a more mature seating position for toddlers from 9 to 24 months – without taking up extra space in the vehicle! From the makers of the top-rated KeyFit, the Fit2 is designed with smart functionality that makes it the easiest to install simply, accurately, and securely, every time. The base features a one-hand-operated ReclineSure leveling foot and two RideRight bubble level-indicators to achieve and verify proper angle in the vehicle seat. Premium LATCH connectors and a force-multiplying SuperCinch tightener help achieve a secure fit with a fraction of the effort! Plus, an integrated stabilizer bar increases surface contact between the base and vehicle seat, providing added support and leverage for a secure install. The base is also designed with easy belt routing and integrated lock-offs for alternate installation with the vehicle seat belt. An enclosed underside helps protect vehicle seats from damage.