Quiet and water resistant sealed, these high quality aerators have been tested and proven to perform day in and day out. The internal piston pump is controlled by a 2 speed setting switch. HIGH setting allows for maximum aeration, while the LOW setting conserves battery life. Each aerator includes 2 sets of air tubing and air stones. The AC-720 model includes a cigarette lighter for continuous and efficient aeration when driving from the bait shop to the water.