Feature: 1. ADJUSTABLE AIR VOLUME: Aquarium oxygen pump is super silent and adjustable, with potential knob adjustment, easy to adjust the air volume and easy to use. 2. LARGE AIR VOLUME: Aquarium aerator adopts newer liner technology, the power is not false, and the air volume is so large that it can even drive four large sand plate. 3. PAINTING SURFACE: Aquarium air pump surface adopts high gloss painting method with gorgeous colors, and 2 check valves are attached inside to prevent water backflow. 4. APPLICABLE SCENES: Aquarium fish tank aerator is suitable for a variety of situations, aquarium oxygenation, aquatic transportation, outdoor fishing, seafood market. 5. Great Gift: It's a great gift for fishing enthusiasts, friends, family, and parents. Specification: Item Type: Aquarium Air Pump Material: ABS Use: Fish Tank Large Volume Oxygen Pump Maximum Air Volume: >10L/MIN x 2 Maximum Air Pressure: 30Kpa Rated Power: 5.5W Product Size: Approx. 13x12x22cm / 5.1x4.7x8.7in. Package List: 1 x Aquarium Air Pump 2 x Check Valve1 x Instruction Manual Note: All data are measured manually, and there are certain errors in the measurement results.