Apr 22, 2017 · Works perfect with the Mighty Mule Single Button Gate Opener Remote (FM135) or the Mighty Mule Digital Keypad (FM137). Backed by a 12 month Mighty Mule Warranty and Technical Support A sturdy 500 lbs. holding force to prevent unwanted intrusion that is ideal for use with cable, chains, or ropes. GTO/Mighty Mule Replacement Control Board for Mighty Mule Gate Openers (R4211). The R4211 control board is compatible with the Mighty Mule Built to support all Mighty Mule accessories. The R4211 can handle push and pull-to-open settings, dual gate operation, and you can use direct power...The Mighty Mule Estate dual gate opener package is designed for dual swing gates up to a maximum of 18 ft. Long or maximum weight of 850 lbs. For all gate types of gates including chain link, tube, panel, vinyl and wood. Mighty Mule Automatic Gate Openers for Sale. CODES (10 days ago) Mighty Mule Automatic Gate Openers. Mighty Mule Automatic Gate Openers are America’s most popular “do-it-yourself” gate openers. These automatic gate openers are designed for residential and rural driveway gates and provide convenience, additional security, and peace of mind.