The Natural Wave™ is a multi-cycle pump timer with six outlets. Two of the three timed outlets have alternate on/off patterns with adjustable periods of 20 seconds to three minutes. The third outlet has a double cycle of 40 seconds to 6 minutes. Connect the pumps of your choice and design the best wave patterns for your aquarium. These outlets provide the optimal 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.