The R4211 control board is compatible with the Mighty Mule FM500, FM502. This control board is a durable, flexible replacement for the circuit board in any of these gate openers. The R4211 control board is capable of handling single and dual gate installations, and it can support push and pull-to-open settings. All Mighty Mule accessories will work with this board.

The R4211 is a replacement control board for the FM500/502
Built to support all Mighty Mule  accessories
Can handle push and pull-to-open settings and dual gate operation, and can direct power from a solar panel or from an AC transformer
Is an ideal replacement control board if a previous board was burned out by a lightning strike, a power surge, or if the previous board was burned out by reversed battery wiring
Not compatible with the Mighty Mule FM200 or FM350/352 automatic gate openers.
Backed by a 12 month limited warranty