The Aqua Medic DC Runner 2.3 is a powerful universal pump for use in fresh and marine water aquaria. The Aqua Medic DC Runner is a magnetically coupled current pump and have a fully encapsulated synchronous motor. All materials are salt-water resistant. The pump is operated at 24 V DC safety voltage, with the transformer included. The Aqua Medic DC Runner 2.3 is controlled via Aqua Medic DC Runner Controller which allows for running a variety of different levels. In addition to control via controller, control via app with smartphone or tablet is possible. The Aqua Medic DC Runner pump is suitable for installation under water and out of water.Aqua Medic DC Runner Controller The included DC Runner Controller is switched between power supply and pump to adjust the output. The power can be adjusted by pressing the +/- buttons, the level is displayed by LED. If you press the button -FEED-, the output will stop for 10 minutes. There is an automatic shut off if there is no water for 2 minutes