The CYBEX Gazelle S adapter allows you to fit select Britax® infant car seats to the frame of your stroller. This adapter converts the Gazelle S into a convenient travel system, making it easier to transition baby from the car to stroller. Features: -Compatible with BRITAX® B-Safe®Gen2, BRITAX® B-Safe 35, BRITAX® B-Safe 35 Elite and BRITAX® Endeavours infant car seats (sold separately) -Easy installation -Includes 2 adapters