The Marine Metal Products Baby Bubbles is a small aerator that runs on 2 AA batteries and aerates up to 3 gallons. This is made for fresh or saltwater, and is ideal for camping trips, or as a back up aquarium pump.FeaturesAerates up to 3 gallonsPrecision motor runs +/- 20 hours on 2 AA batteries, also runs on 1 batteryImpact water resistant case with rubber booted switch24" of tubing & airstone includedAdjustable stainless steel mounting clip