This Britax combination car seat is suitable from birth up to 9 months when the seat is rear facing and when the seat is forward facing it is suitable from 9 months up to 4 years old. This seat comes complete with an internal 5 point, 1 pull harness and is secured in the car with an adult seat belt. Remember not all car seats fit all cars so you must always try before you buy. The features that come with this seat include a newborn support pillow that helps your baby lie with added comfort when travelling in rearward mode, and a five position adjustable seat when forward facing. This is a great seat that will grow with your child until the age of four years old.