Mighty Mule RB570 Replacement Transformer
The RB570 is an 18 Volt AC transformer for use with many GTO/Mighty Mule automatic gate openers. The transformer maintains battery backup by providing a trickle charge of power to the gate opener battery. Compatible with the Mighty Mule FM500, FM350, GTO/PRO-1500, PRO-2500, PRO-3000, and PRO-4000.