Use this transformer for all versions of the PRO3000, PRO4000, PRO2500, PRO1500 as well as the Mighty Mule FM500/502 and FM350. Also used for all newer PRO2000 or SL1000 gate operators. They will have a warning beeper feature built-in to the control box, whereas the older ones do not. Number of cycles per day usage does not matter.
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