The Evenflo Gold Revolve360 Extend will help put your mind at ease when it comes to child car seat safety, featuring SensorSafe to connect you to your little one from the backseat. While your eyes are focused on the road, integrated SensorSafe technology alerts you in real-time to four potentially unsafe conditions from your child’s car seat via your phone: unexpected chest clip unbuckling, temperature too hot or too cold, child unattended in the car, and child seated too long. Install the seat just once for rear-facing and forward-facing modes of use — no need to remove the seat in order to make the switch. Sure360™ Safety Installation System with LockStrong™ and Tether360™, plus a handy bead-level indicator for leveling in seconds, make your one-time installation safe, secure and simple. Features JOIN THE SUSTAINABILITY REVOLUTION: Features our soft-to-the-touch, environmentally friendly Green & Gentle Fabric — free of added chemicals and flame retardants, and manufactured using 26 recycled plastic bottles PROTECT WITH EXTENDED REAR-FACING USE: Allows you to keep your child rear-facing longer as recommended by child safety experts — all the way up to 50 lb. Includes a reversible, ergonomic leg rest that’s padded to add comfort for growing legs GET IN AND OUT EFFORTLESSLY: One-hand, 360° rotation makes it a breeze to get your child in and out of the car — an award-winning innovation that keeps on giving! GROW WITH IT: Provides 3 modes of use that adapt to every stage — rear-facing (4 to 50 lb), forward-facing (30 to 65 lb) and booster (40 to 120 lb) FEATURES L.I.F.E. GUARD: Linear Impact Force Engineered to improve safety performance in side impact crashes SAFETY IS A PRIORITY: Meets or exceeds all applicable Federal Safety Standards as well as additional testing for structural integrity, rollover performance and temperature effects Details Rear-Facing Mode Weight - 4.0 - 50.0 lbs Height - 17.0 - 48.0 in Top of child’s head is at least 2.5 cm (1 in) or more below the top of the Car Seat Headrest or Shell. Harness Straps must be adjusted to be AT or JUST BELOW child's shoulders. Forward-Facing Mode Weight - 22 - 65 lbs Height - 28 - 49 in Top of ears must be below top of headrest High Back Booster Mode Weight - 40 - 120 lbs Height - 44 - 57 in Tops of the child’s ears are at or below the top of the Booster Seat headrest Specifications Age 0 - 12 Years Weight: Max 120 lbs (54.43 kg) 19.8"W x 25.9"H x 21"D (CM 50.29W x 65.79H x 53.34D) Weight 29.6 lbs (13.43 kg) China 23"W x 27.63"H x 20.88"D (CM 58.42W x 70.17H x 53.02D) Weight 40.6 lbs (18.42 kg)