Group 0+ 1 2 3/From 0 - 36 Kg/From 0 to 12 years. This is a highly versatile seat that covers all the child safety seat groups. In other words| it adapts progressively to the growth of the child (up to 36 kg) without the need for a new seat.  The rear-facing child seats offer better protection especially in the case of a frontal impact| one of the most serious and common road accidents.  Product Features: 1 seat 4 stages-this car seat covers all age groups: from group 3 group 0+ Reclining positions-with backrest regulator device to travel upright or reclined when the child is resting. Height adjustable headrest-headrest is adjustable in height adapting to the childs growth. Side impact protection-the chairs backrest and headrest sides give it excellent protection in the case of side impact. Crash tested How To Use: All children whose weight or height exceeds the forward-facing limit for their car safety seat should use a belt-positioning booster seat until the vehicle seat belt fits properly| typically when they have reached 4 feet 9 inches in height and are 2 to 3 years of age.  Caution & warnings: Keep toddlers seat rear-facing in the back seat of the car.