Install an infant car seat, and get rolling quickly and easily. With this adapter, you can have one infant car seat on one side, and your stroller-age child sitting on the other. Fits one infant car seat. Belt holds car seat securely. Easy to install and remove (belt attaches with a screwdriver, then clicks into place). Built-in snack tray for the non-car seat side. Folds with stroller. Works with Chicco KeyFit and KeyFit 30 models. Designed for walking only, due to the high centre of gravity. Fits Duallie stroller models with a manufacture date of September 2015 or later.