This Bugaboo Turtle Infant Car Seat by Nuna Extra Base makes it easy to share the Bugaboo Turtle Baby Capsule with all caregivers. This car seat base comes with a tether strap and a snap hook that need to be connected to your car's anchorage point (more detailed instructions on how to install it are available in the user guide). This will ensure your child's protection during all your journeys, as it significantly reduces the car seat from moving onwards, backwards or sideways. The Bugaboo Turtle Isofix base also comes with connector guides on the side, that will become green when the car seat is safely secured into the base. It also comes with a bubble level indicator, so you also know if the car seat base is correctly angled. Note: Bugaboo Turtle by Nuna baby capsule sold separately.