This Mightly Mule FM135 / GTO RB741compatible mini key chain remote control from Transmitter Solutions can replace any GTO/Mighty Mule 318 MHz remote control with 9 (+/0/-) dip switches. Programming is simple just match the 9 switches inside of this unit to your exisitng remote control or actual door opener and your ready to go.
Compatible with the following remotes:
-GTO RB741, RB742, RB743, RB744
-Mighty Mule FM135, FM136, and FM137
-318 MHz frequency gate or garage door remote transmitter
-Controls one garage door or gate opener
-Includes key chain clip, 12 volt battery, and programming instructions.
-Built-in LED light to indicate battery strength
-Dimensions: 2 by 1.5 by .5 inches
-Two year manufacturer warranty