The Promar 2 Speed Bait Aerators are quiet and water resistant. 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. The high setting allows for maximum aeration, while the low setting conserves battery life. Each aerator includes 2 sets of air tubing and air stones. Features Perfect solution for your outdoor adventures Superior grade materials for unbeatable safety and comfort Rugged construction for maximum strength and durability