The Natural Wave is a multi-cycle pump timer with six circuits that have timing patterns alternate on/off with adjustable periods of 20 seconds to 3 minutes. The third circuit has a double cycle of 40 seconds to 6 minutes. Connect powerheads or pumps and design the best wave patterns for your aquarium. These circuits provide the optimum flexibility for you to create random circulation patterns. An illuminated indicator lets you know the cycling times. The remaining three outlets are standard power outlets and can be used for accessories such as filters, lights, or heaters.