For ultimate safety and ease of installation with phil&teds alpha or mountain buggy protect capsule. Foolproof installation indicators- Light indicators turn from red to green when ISOFIX is correctly installed in to lugs, support leg is on the floor and capsule is locked in place ready to go! For foolproof safety where you need it most! Easy click-and-go installation- Place the capsule on to the ISOFIX base and hear the capsule click in to place, and indicator change to green. Easy capsule release- simply switch the release gage and pull the handle. The indicator will change from green to red when the capsule is out of the base ready to be carried on arm, in hand or placed on stroller. Slim line so there is more space for other passengers.