The 12 and 24VAC LED Transformers include transformers whose input is 220 volts in alternating current, with a 50Hz frequency service, and whose output is 12 or 24 volts of alternating current. All transformers have an IP68 ingress protection rating, so they can be immersed in water without any problem. There are models of different powers depending on the number of lamps that the user wants to connect.