CYBEX Base G Car Seat BaseGetting your child in or out of the car has never been easier thanks to the Base Gs rotation mechanism and Driving Direction Control putting them in just the right position. Compatible with Cloud G i Size and Sirona G i Size car seats. Specifications: Age range (when combined with the Cloud G i Size): From birth up to approx. 24 months Age range (when combined with the Sirona G i Size): From birth up to approx. 4 years Approval regulation: UN R129 03