Mighty Mule Replacement Control Board for Mighty Mule Gate Openers (R4211) The R4211 is a replacement control board for the FM500/FM502 & MM560/MM562 series swing gate openers UL 325 6th Edition Compliant that features Mighty Mule's exclusive Dual Sense Technology for additional protection & safety 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 Built to support all Mighty Mule accessories. Not compatible with the Mighty Mule FM200, MM260, FM350/352 and MM360 automatic gate openers