The UNO2DUO travel system starts out as a single stroller and expands into a double stroller to grow with your family. With the included Infant Car Seat, the UNO2DUO Travel System has 18 ways to ride. With an easy, one-hand fold, parent cup holder, and extra-large storage basket, the UNO2DUO is a fully-featured stroller. The main seat reclines flat to become an infant bassinet, while the removable child's tray and standing platform offer a customizable ride. Incorporate the second seat (sold separately) to create a tandem stroller, and the UNO2DUO offers even more customization and riding options. For children up to 50 lb, the UNO2DUO stroller is truly, the only stroller you'll ever need.