The Otto Car Seat fits securely on to the ISOFIX Base to ensure your car seat is fitted correctly every time you travel. Once attached to the isofix points in your vehicle, the base has a multi-position safety leg to give stability and indicators show you the seat is locked in place correctly. Features: Hydraulic ISOFIX arms for ease of attachment to your vehicle. Multi-position safety leg for stability. Green indicator light to ensure correct fitting of car seat.