Feature: 1. Stable Performance: Aquarium air pump surface high gloss spray paint surface, colorful; using newer inner liner technology, super quiet operation, super air volume, even can drive 4 nano sandbox. 2. Widely Used: AC and DC power supply of aquarium oxygen pump can be switched, automatic start in case of power failure; suitable for fishing, fish pond, seafood pool, etc., the use of environment is more free. 3. 10 Levels Adjustment: Fish tank air pump with touch screen display device; 10 levels of air volume adjustment, easy to use, free to adjust according to the size of the fish tank. 4. Easy to Install: Aquarium air pump with four nano air discs, two tees and one air tube, can be directly installed and connected to use, super large air disc, more bubbles. 5. Cautions: The fish tank air pump can work intermittently for about 72 hours according to the minimum air volume test, it is not recommended to turn on the maximum or larger air volume when you go out, the air pump itself has sufficient air volume, which is larger than many air pumps. Specification: Item Type: Aquarium Air Pump Material: ABS Size: Approx. 22x12x13cm / 8.7x4.7x5.1in Use: Fish Tank Large Volume Oxygen Pump Endurance: >36<72hours Rated Power: 4W Maximum Air Volume: >9L/MIN x 2 Maximum Air Pressure: 26Kpa Battery Type, Capacity: Lithium Battery 18650 x 1 (5000mAh) (Shipped with Built in Battery). Package List: 1 x Aquarium Air Pump 1 x Manual 1 x USB Cable 2 x Red Check Valve 4 x Air Tray 4 x Suction Cup 4 x Adjustment Valve4 x Transparent Check Valve 2 x Tee1 x Air Hose Note: Please allow for some errors in manual measurements.