Liftmaster LA400UL Swing Gate Operator Download Specs Download Manual The Liftmaster LA400PKGUL is a state-of-the-art sliding gate operator that is perfect for tech-savvy individuals who want ultimate convenience and control over their home entry. With its smartphone capabilities you can easily open the gate with just a few taps on your phone even before you reach the house. The LA400u is powered by a strong 24VDC motor and can handle gates up to 16 feet in length and 850 pounds in weight with smooth gentle start/stop operation that helps extend the life of the gate and operator. In addition to its smartphone functionality the LA400u also comes with an exclusive on-board radio receiver that allows you to use a single remote control for not only the gate but other access points as well. Safety is a top priority with the LA400u which includes features such as a photocell inherent and external obstruction sensing a start/stop closure timer DC operation and a battery backup system. It also has a keyed manual disconnect LED indicators an electronic limit system and a bi-part latch. If you want the latest and greatest in gate automation technology the Liftmaster LA400u is the perfect choice. Specifications Max gate size: 16ft Max gate weight: 850lb.