Mighty Mule Dual Button Gate Opener Remote (FM134) The Mini Dual-Button Gate Opener Remote is a great accessory for a replacement or for an additional user to compliment your Mighty Mule or GTO/PRO Automatic Gate Opener Easy DIY (Do It Yourself) programming for your Mighty Mule Automatic Gate system Mighty Mule also offers the 1-button gate opener remote (FM135) and the 3-button remote (RB743) for easy use with a second Gate Operator or garage door. Garage door openers require the Universal Receiver (RB709U-NB) Backed by a 12 month Mighty Mule Warranty and Technical Support.