Features: Three working modes: continuous/intermittent/power saving mode It contains a rechargeable lithium battery, it can be charged by solar energy or DC/AC power, Lithium batteries can also operate automatically for 24 hours in the event of a power outage. 3.5W solar panel can convert light energy into electric energy, it works better when the sunlight is intenser, it's energy-saving and eco-friendly to use. Long press to turn on/ off the air pump, short press to choose mode. 3 modes for selection according to practical use: continuous/ intermittent/ power saving mode. Dual air flow pipe with dual air bubble stone provide total 2.4L flow per minute for more even and pervasive air distribution, thus bringing excellent water circulation. Perfect for adding oxygen into various aquariums, fish tank, pools and small ponds, especially suitable for wild fish and small amounts of aquatic transportation oxyen increasing. Rechargeable design, 4400mAh large capacity battery, fits for both home and outdoor use, effectively solving the problem of fish being starved of oxygen when the power goes off. Easy to use, just put the air stones in the water and install the solar panel, the pump will start to work in seconds once exposed to sufficient sunlight. Suction cups in the back of the pump help it tightly stuck to the surface of the fish tank. Besides, it comes with complete accessories for easy carrying or hanging on the wall. Made of high-quality material, not easy to break or deform, durable to use, long lifespan. Low noise, quiet to use, will not disturb sleep or work. Note: Size and color may be slightly different due to manual measurement and different lighting conditions. Thanks for understanding. Specifications: Color: Black Material: ABS + PC Solar Panel: 6V/ 3.5W Built-in Battery: 2 * 3.7V 2200mAh Lithium Battery Charging: DC 5V/ 1A Power: 0.8W Pressure: 130KPa Flow: 1.2L/min * 2 Current: 250mA Solar Panel Size: 22 * 13.5 * 1cm / 8.7 * 5.3 * 0.4in Pump Size: 10.3 * 8.3 * 4cm / 4.1 * 3.3 * 1.6in Package Size: 23.8 * 14 * 5.5cm / 9.4 * 5.5 * 2.2in Package List: 1 * Solar Panel Set (2m wire length) 1 * Air Pump Set 1 * USB Cable 1 * Installation Set 1 * User Manual

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