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 Description: 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. In This Type Of Collision, The Shock Forces Are Dispersed In The Back Of The Chair, So That The Child Suffers A Lower Deceleration And Absorbs A Smaller Amount Of Energy Than If He Were Traveling Oriented In Favor Of Gait.