The lightweight, portable Doona LATCH Base is compatible with the Doona Infant Car Seat (sold separately) and is designed for rear-facing use only. The base can be installed in your car with the LATCH system or with the vehicle's belt. The height-adjustment mechanism and easy-to-read level indicators ensure proper seat angle positioning. Its secure snap-in, snap-out connector system allows you to easily move from car seat to stroller mode in seconds.