http://tinyurl.com/pmchsbtMighty Mule FM502 Automatic Gate Opener for Heavy Duty Dual Swing GatesProduct Review Click on the link for more reviewsDIY gate opener made for dual gates up to 18-Feet long per leaf or gates weighing up to 850-Pound per leafWorks on all types of gates, including wood, chain link, tube, wrought iron, aluminum and vinylEasy to install in 2-3 hours--comes with an installation video and detailed installation manual, as well as all mounting hardware and batteries needed for operationThe 12-Volt DC powered low voltage system works well using direct wire or solar power; GTO recommends 10-Watt of solar power for use with the FM502 dual gate openerDesigned for gates that open into or away from the property