Installation Methods INSTALLATION VERSATILITY The PROsafe35 has included a unique base for an easy installation in the car. You can connect the base with your vehicle while using the included LATCH connection system or your 2- and 3-point belt system. You can also install the PROsafe35 without the base while using just the 2- or 3-point belt system of the car. Additional bases are available for multi-vehicle families. Level Indicator INSTALL WITH CONFIDENCE An easy-to-read level indicator alerts you if the car seat is not locked into the base at the correct angle, based on the weight of your baby. Use the double function of the lock-off system to adjust the angle. Unlike most other car seats, the PROsafe35's levelling features are located inside the base, not on the exterior, where they can be accidentally knocked or altered. This provides your baby with an additional level of safety in the vehicle.