The UPPAbaby Mesa Max Extra Base (SKU?0901-MMB-US) provides added convenience for families using multiple vehicles. Designed for seamless installation using the SmartSecure system, it features auto-retracting LATCH connectors, red-to-green tension indicators, and dual bubble-level indicators for correct alignment. The adjustable load leg and Anti-Rebound+ panel enhance safety by limiting forward and rebound rotation in crashes, while the built-in lock-off secures belt-installed setups. Finished with a low-profile, smooth-bottom design to protect vehicle interiors, its streamlined yet robust and made for long-term use. Ideal for households wanting to avoid transferring a car seat base between vehicles