Featuring convenience, safety and comfort, the Pinnacle Click Tight is an exceptional Harness-2-Booster Seat. With the Click Tight Installation System, everyone can install the car seat securely. Simply squeeze the release button to open, buckle the seat belt across the belt path and click the seat shut for a proper installation every time. Safe Cell Impact Protection surrounds your child in safety components that work together to protect beyond the established federal safety standards. Complete Side Impact Protection features external cushions that maximize the absorption of crash forces and a foam headrest that keeps your child’s head and neck secure. The Pinnacle Click Tight Harness-2-Booster Seat can be used in Harness Mode for children 2 years old and 25 lbs. up to 90 lbs. and in Booster Mode for children 40 lbs. up to 120 lbs. May not be compatible with all vehicles. See user guide.