Safety, comfort and user-friendliness have at all times played an important role in the development of the Child Safety Seats. This product meets the most stringent safety regulations and has passed the most stringent compulsory safety testing required by law., The Belecoo ultimate spin 360-degree Group 0 + / 1 / 2 / 3 combines all 4-stages into one Child Restraint System with Rotate function. It can be used as an Extended Rear Facing Seat with either Seat Belt or ISOFIX/Top-Tether install. It can be installed with the vehicle's seat belt or with ISOFIX & Top Tether., If one vehicle has ISOFIX and another does not, then it can be installed in both vehicles. Group 0 / 1 / 2 / 3 - ROTATE SEAT - 0-36 kg (Approx. Birth - 12 years). Rearward facing from Birth to 18kg (Group 0/1) - Can be installed with Vehicle Seat Belt or ISOFIX & Top Tether., Forward facing from 9 to 18kg (Group 1) - Can be installed with Vehicle Seat Belt or ISOFIX & Vehicle Seat Belt, Booster seat from 15 to 36kg (Group 2/3) - Can be installed with Vehicle Seat Belt or SAFEFIX & Vehicle Seat Belt