Feature: 1. SUPER SILENT: Aquarium air pump is high gloss spray paint surface, colorful, using updated inner liner technology, super silent operation, super air volume, even can drive 4 nano sand plate. 2. POWER SUPPLY SWITCHABLE: Fish tank air pump AC and DC power can be switched, power failure automatically start, fishing, fish ponds, seafood pool a wide range of uses, the use of the environment more freely. 3. WORKING HOURS: Aquarium oxygen pump can work intermittently for about 72 hours according to the minimum air volume test, it is not recommended to open the maximum or larger air volume when going out. 4. TOUCH SCREEN: Aquarium fish tank oxygen pump has touch screen display with 10 levels of air volume adjustment, which is easy to use and can be adjusted freely according to the size of the fish tank. 5. EASY TO INSTALL: Aquarium fish tank aerator comes with two nano air trays and one air tube, can be directly installed and connected to use, super large air tray, more air bubbles, air pump itself is sufficient air volume, larger than many air pumps. Specification: Item Type: Aquarium Air Pump Material: ABS Use: Fish Tank Large Volume Oxygen Pump Endurance Time: >36<72Hours Rated Power: 4W Maximum Air Volume: >9L/MIN x 2 Maximum Air Pressure: 26Kpa Battery Type and Capacity: 1 x Lithium Battery 18650 (5000mAh) (Shipped with Built in Battery) Product Size: Approx. 13x12x22cm / 5.1x4.7x8.7in. Package List: 1 x Aquarium Air Pump1 x Instruction Manual1 x USB Cable 2 x Red Check Valve2 x Air Plate2 x Suction Cup2 x Adjustment Valve 2 x Transparent Check Valve1 x Air Hose Note: All data are measured manually, and there are certain errors in the measurement results.