The Baby Trend Flex Lock Infant Car Seat in Sonic will accommodate infants between 5 and 30 lbs. and a height of 30 in. or less. This car seat boasts a 5 pt safety restraint system with an easy one-handed harness adjustment and a push button release, so no harness rethreading is required, minimizing the risk of incorrect assembly! The height adjustable head support and padded suede seating area provides optimum comfort for baby. The car seat includes EPS energy-absorbing foam for superior side impact head protection, safety clips that securely attach to most shopping carts, a rocker base for comforting the baby, and a detachable boot that provides warmth during cooler weather. The separate base features 4 height positions and a level indicator system for proper installation. The car seat can be removed from the base using a one-handed easy-access seat release. This car seat is certified as a car seat with or without the separate base.