Radian 3R is the original 3 across All-in-One convertible car seat. Now rear-facing even longer (up to 22.7 kg / 50 lb) and suitable from birth to 54 kg / 120 lb, expect 10 years of safety from just one car seat. Life is complicated enough that's why here at Diono we carefully craft our products to be intuitive and as easy to use as possible while still providing the optimum level of safety and security for your little ones. At the core of the Radian 3R is our unique mechanically engineered dual spine fabricated from automotive grade high strength steel that provides an unyielding structure to protect and shield. Our unique SuperLATCH system makes installation easy and secure with an audible click. The Diono Radian 3R surrounds your child in overprotective, strong materials giving you peace of mind wherever life takes you on the special journey that is parenthood. We've thought of everything so you don't have to. Features: Stages: Rear-facing harness (5-50 lbs), forward-facing harness (22-65 lbs), high-back belt positioning booster (40-120 lbs); Grows with Child: Expandable seat width, converts to high-back belt positioning booster; Includes: Anti-slip harness pads, easy remove machine washable cover, LATCH guides, shoulder belt guides; Safety Features: Automotive grade steel core frame, aluminum-reinforced sides and energy-absorbing foam, 5-point harness, convenient fold and FAA Approved for aircraft use, tested over and above safety standards; The Original Three Across: Built with our famous Radian slim fit convertible design for a 3-across option only with Diono Radian combinations, without compromising child or passenger comfort; Rear Facing for Longer: Designed and engineered to keep your child rear facing even longer up to 50 lbs. approx. 4 years old; Specifications Dimensions (Overall): 28.5 Inches (H) x 17.0 Inches (W) x 16.0 Inches (D); Weight: 25.9 Pounds; Features: Fits 3 Car Seats Across; Fits Child (Forward Facing): Height between 29.9 Inches and 57.1 Inches, Weight between 22 Pounds and 120 Pounds; Fits Child (Rear Facing): Height between 18.1 Inches and 44.1 Inches, Weight between 5 Pounds and 50 Pounds; Includes: Latch Guides, fabric cover, 2 Car Seat Strap Covers, Shoulder Belt Guide, Car Seat Base; Industry or Government Certifications: Meets FMVSS 213, FAA Approved, Meets Federal Motor Vehicle Safety Standards;.