Marine Metal Products Bubble Box White. Runs up to 33 hours on 2 D cell batteries. Weighted airstone. Water resistant. 1.5 volt air pump. Batteries not included. Specifications for Marine Metal Products Bubble Box: Manufacturer: Marine Metal Products Color: White Length: 7.5 in Width: 4 in General Application: Fishing Quantity: 1 Features of Marine Metal Products Aeratr Bubble Box Aerates up to 8 gallons. Precision motor runs + - 44 hours on 2 alkaline D cell batteries also runs on 1 battery. Pumps 1.4 STL / minute. Impact water resistant case with rubber booted switch. Beryllium copper battery contacts for longer battery life. Weighted air stone with 24in of silicone air line tubing enclosed in pump. Large adjustable stainless steel clip for attaching to any bucket. Dry Box (clam shell package designed to keep pump dry while in use). Designed for fresh and saltwater use. Each pump individually tank tested to assure highest quality. Package Contents: Marine Metal Products Aeratr Bubble Box Marine Metal Products B-11: Bubble Box White