With all the convenience of the KeyFit & KeyFit 30 Base?s installation, what could be better than to have multiple bases in your multiple vehicles? The Chicco offers you this convenience with the option of buying extra KeyFit & KeyFit 30 Bases. The KeyFit & KeyFit 30 Base?s spring-assisted level foot, two precision bubble levels, and ?Center-Pull? LATCH adjustment guarantee quick and correct installment from either side of your vehicle and give you confidence that your child is safely secured in your vehicle. The KeyFit & KeyFit 30 Infant Car Seats are compatible with the Chicco Ct0.1, Cortina and Trevi strollers.