Timer provides onoff cycling of aerator. Solid state cycle module switches pump to on on to run time of 30 seconds for 3 minutes off. Fits Johnson Pump aerator pumps along with most competitors models. California Residents WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov Other Details Google Product Type Livewell Wiser Yes Product MPN 61125 Product UPC 729321916783 Fast Ship In Stock Ships Today