Easy-to-use pump controller creates natural currents in aquariums * Connect circulation pumps and select one of 2 available programs * Synchronous program for currents typical of barrier reefs and Alternate for tides HydorSimple and efficient controller streamlines the creation of natural currents that promote healthy aquariums. Just plug the Hydor Koralia SmartWave Pump Controller into an electrical outlet and the unit is ready to work. No complicated programming is involved. Simply turn the knob and select one of two available programs to enjoy water currents essential to nourish and feed aquarium inhabitants, remove "dead spots", as well as regulate your aquarium's water temperature. Alternate Mode activates one pump while the other remains OFF. This pump sequence alternates to create currents that simulate ocean tides. Synchronous Mode activates both pumps simultaneously and then shuts off both pumps to recreate currents typical of barrier reefs. Select time interval settings from 5 seconds up to 6 hours for custom aquarium water movement. Koralia SmartWave has 2 three-prong outlets that accept circulation pumps and other electrical aquarium devices up to 100 watts each. Smartwave works with Koralia circulation pumps and most aquarium pumps available on the market compatible with quick ON-OFF sequences. Plug in an automatic fish feeder to experience the added convenience of keeping your fish fed, even while you're away. Program one or two feedings. Compact, Smartwave has a built-in hanging eyelet for convenient installation inside your aquarium cabinet. Unit is UL approved and water resistant. 7" x 8" x 1-1/4" thick. 6 ft power cord.