Evenflo Symphony Convertible Car Seat with SureLATCHSymphony featuring SureLatch combines the latest technology to provide a safe and comfortable ride for baby and peace of mind for mom. Tested using Evenflo's Side Impact Test Standard, Symphony featuring SureLatch is safety made easier. convertible car seat features the exclusive SureLatch technology, which installs your seat to your vehicle as easily as buckling a seat-belt. The Infinite Slide Harness Adjustment System makes for easier height adjustment with no rethreading! Plus, the Symphony accommodates children from 5-100 pounds, making it the only seat your child will ever need, plus the multiple-position recline means it meets the comfort needs of your child! Combine all the great comfort features and innovative safety features like the SureLatch Connectors and you have a seat that is music to your ears!