The only car seat your child will ever need, this convertible style offers state-of-the-art safety and comfort for your little one as a rear- and forward-facing car seat and as a high-back booster seat-on the job for up to 10 years.Why parents will love it: With advanced safety features and easy installation and release, this convertible car seat monitors the well-being of your little one through the smart chest clip that syncs with the installed vehicle receiver and your smartphone.Why kids will love it: The 12-position adjustable headrest and 3-position recline provides the ultimate in comfort and ergonomic positioning for rear-facing and forward-facing installations.Child weight/height: Suitable from birth up to 120 lb.; rear facing from 4-50 lb.; forward facing from 22-65 lb.; belt-positioning booster from 40-120lb.Safety features: The five-point harness takes safety to the next level with a chest clip featuring Sensor Safe technology, which communicates with you via a receiver you insert into your vehicle's OBD-II port (it also connects to your smartphone), alerting you to unsafe conditions or if the baby has been seated too long or left in the car. A foam-lined energy-absorbing shell helps absorb the forces of impact to protect your child, while Linear Side-Impact Protection (L.S.P.) absorbs 25% more force in a side-impact collision.Harness: 12-position height adjustable headrest with integrated no-thread, five-point harness for protection that grows with your child.Car installation: Innovative one-pull LATCH system for easy installation and removal from the vehicle seat.Stroller compatibility: N/A. Sensor Safe alerts you when child unbuckles the chest clip while still in motion; if child is seated for a prolonged period of time; if the temperature gets too hot or cold; or if child is still buckled in the car seat after you leave the vehicle, and notifies emergency contacts if no action is taken, sharing your location Download the free Sensor Safe app which also