Bubble Box Portable Air PumpQuiet pump offers exceptional value with waterproof switch and weighted airstone. Runs up to 36 hours on two alkaline D batteries. Adjustable stainless steel mounting clip adapts to all livewells and coolers. Aerates up to a 7 1/2 gallon tank. Type: Diaphragm Capacity: 0.87 liters/minute Draw: Runs on two alkaline D batteries Inlets/Outlets: Weighted airstone Mount: Adjustable stainless clip Warranty: One year