The Marine Metal Bubbles™ Air Pump pumps 7/8 liter of air per minute and runs up to 85 hours on 2D alkaline batteries (not included). Aerates up to 7-1/2 gals. Includes waterproof switch, 30" of air tubing, glass-bead air stone, impact-resistant case and adjustable stainless steel clip for attaching to any bucket. Individually tank tested. Made in USA.