简单说一阶段(Group or 0+),宝宝出生到18个月或13KG要用提篮式面朝后坐;二阶段 (Group 1)18个月以上到4月且提供为9-18公斤间,样式类似第一阶段,这是宝宝是超前做的;三阶段(Group 2)是3到12岁且提供在15-36KG间,见第二张图,面朝前坐,但是两边要有保护,背带式安全带;四阶段(Group 3),适用范围同三阶段,适用于更大点的孩子,一般6-7岁了就可以用增高垫了 Booster seats (Group 2 or 3) For ages from 3 to 12 years and between 15-36kg (approximately 2 stone 5 pounds to 5 stone 9 pounds). The Group 2 is basically a standard-looking seat but scaled down that sits on top of the vehicle’s fitted seat. For restraint, the standard seatbelt is used; the child is simply boosted to a level where the belt fits as it should. A Group 3 seat is effectively a cushion that raises the passenger to the required height and is used for slightly larger children (again, using the standard fitted seatbelt).
Booster seats (Group 2 or 3)
For ages from 3 to 12 years and between 15-36kg (approximately 2 stone 5 pounds to 5 stone 9 pounds). The Group 2 is basically a standard-looking seat but scaled down that sits on top of the vehicle’s fitted seat. For restraint, the standard seatbelt is used; the child is simply boosted to a level where the belt fits as it should. A Group 3 seat is effectively a cushion that raises the passenger to the required height and is used for slightly larger children (again, using the standard fitted seatbelt).