This product is packed with features that can be used from newborns up to around 4 years old, adapting to the child's growth. Designed for long-life use, prioritizing safety and comfort. 【Reclining Position】 - Rear-facing - ・Use rear-facing for newborns up to around 3 years old (weight: 2.3-18kg, height: 48-94cm). ※ It is recommended to use rear-facing until around 2 years old. 【Upright Position】 - Forward-facing - ・Use forward-facing for children aged 1 to around 4 years old (weight: 9-18kg, height: 71-102cm). ※ It is recommended to use rear-facing until around 2 years old. ※ The overlapping weight and height ranges for rear-facing and forward-facing can be used in either position. However, we recommend using the rear-facing position for as long as possible. If you have any questions, please feel free to contact us. 【Usage Period】 Age: Newborn to around 4 years old Weight: 2.3-18kg Height: 48-101cm 【Size】 Rear-facing: W 470 × D 701 × H 501 mm Forward-facing: W 470 × D 558 × H 647 mm 【Weight】 Main unit: 4.13Kg 【Safety Standards】 FMVSS (U.S. Federal Motor Vehicle Safety Standards Compliant) FAA (Federal Aviation Administration) Approved