Powerful, air-cooled OHVI engine. Fueled by natural or LP gas. Built-in component eliminates the need for special kit to transfer between natural gas and liquid propane. Remote-mounted automatic transfer switch has built-in emergency load center for fast and efficient unattended transfer to generator when utility current fails. Installation kit also comes with external connection box, flexible fuel line, 30ft. of pre-wired flexible conduit and composite mounting pad. Built-in charger keeps battery at optimum level. Key locks for security. Automatic 7-day exerciser runs the system for 12 minutes weekly to maintain top running condition. 2-year limited warranty. Truck Ship. U.S.A.