Mighty Mule Silver Series Heavy Duty Dual Gate Opener Kit 18ft 850lbs HD Designed for double swing gates up to 18 ft. long or up to 850 lbs. per leaf 12 volt system, no electrician required - Easy operator to install for the "do-it-yourselfer" Soft start/stop feature increases the life of the opener and gate hardware Gate will work during electrical power outage 12 month limited warranty