Features: Conforms to R129/03 standard Compatible with Acorn i-Size car seat Easy to install using ISOFIX points in the car Has 5 visual indicators to confirm correct fitting in your car Acorn i-Size base has a rebound bar and support-leg anti-rotation device to prevent car seat movement Allows for Acorn i-Size car seat to be used with ISOFIX or i-Size Collapsible leg for transportation and storage