Features: Added convenience with the option of extra bases for your multiple vehicles. Spring-assisted level foot, bubble levels, and “Center-Pull” adjustment for quick, easy and accurate installation. LATCH system, with easy "push-on" style LATCH connectors. Convenient, built-in belt lock-offs for cars without the LATCH system. Smooth underside that won’t dent or scratch your car’s interior. 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? 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.