Marine Metal Bubble Box Air Pump has a precision motor that runs +/- 44 hours on 2 alkaline D cell batteries or +/- 22 hours on 1 alkaline D cell battery. Featuring a booted waterproof switch, this air bubbler is water-resistant and long lasting. Its included weighted glass bead airstone with 24" of airline tubing. Marine Metal Bubble Box Air Pump is a portable, affordable oxygen diffuser to keep live bait fresh or as a back up pump for aquariums. Includes an impact-resistant case and adjustable stainless steel clip for attaching to any bucket.