This is aquarium fish tank oxygen air pump hydroponics with functions of multi-level muffler, low noise, solar air pure. And with regulating valves, it can effectively regulate the air displacement. It is high-performance, large volume, for small and medium-sized fish tank plus oxygen. It is perfectly suitable for using in all kinds of high-grade aquarium, aquaculture oxygenation, spout decoration, etc. Features - ColorAssorted Color - Material: ABS. - Size: 14 x 1.5cm/ 5.51 x 5.12 x 0.59inch. - High-performance of the item is for small and medium-sized fish tank plus oxygen. - Low-power, economic power-saving, continuous operation and . - With regulating valves, can effectively regulate the air displacement. - This is aquarium fish tank oxygen air pump hydroponics with functions of multi-level muffler, low noise, solar air pure. - Small volume, large , low noise, long life, and/ . - Equipped with belt buckle for easy carrying. - Stable performance and strong . Specification Product model: zy-02. Input voltage: 5V. Operating : no more than 150mA. Gas flow: greater than or equal to 2L/min. Solar panels: 2W, 2 meters long. Purpose: used for failure emergency supply oxygen, fish market, fish transportation for oxygen, field fishing and other places of fish supply oxygen. Method of use Press the power-on button (3 seconds), the blue light is on to indicate that it has been turned on, and at the same time it enters the long time oxygen mode. Press the button (1 second) to enter the intermittent working mode (stop for 2 seconds and run for 8 seconds). When the power is low, the red indicator will enter a quick flashing, and should be in time. Charging method: connect the phone charger or 5V solar panel, insert the charging interface, and the enters the slow flash state. Package list: 1 x Solar Charging Moving Air Bubble Aerator Aquarium Fish Tank Pond Pump Hydroponic Oxygen (Green)