The Marine Metal Bubble Box keeps bait alive and kicking with up to 30 hours of aeration. Compact and quiet, it's ideal for buckets, coolers, or small tanks in both fresh and saltwater. Runs up to 30 hours on (2) D batteries (not included) Aerates up to 7.5 gallons of water Perfect for buckets, coolers, and small tanks Quiet operation with durable overlap case Includes air stone and adjustable clip Safe for freshwater and saltwater use