Mighty Mule Automatic Gate Opener for Single Swing Gates Up to 12 Feet Long or 300 Pounds (FM200) N/A Imported Mighty Mule's best value performance package. America's #1 DIY (Do It Yourself) Gate Opener since 1987. Designed for single swing gates up to a maximum of 12 ft. or maximum of 300 lbs. 12 Volt Automotive or Marine Type Battery Required. 30% Residential Energy Efficient Property Tax Credit available. Residential home owners can use this credit on a new operator system accessories and installation with the purchase of a Mighty Mule Solar Panel;5-watt (FM121) or 10-watt (FM123). Type of gate material: Vinyl, aluminum, chain link, farm tube, wrought iron, wood (not recommended for solid surface gates)