1. Solar water pumps, aerators, and pond aerator kits. High air flow - up to 0.9 liters per minute. 2. The solar panel can be tilted at 100 degrees, making it easy to adjust the angle to absorb maximum solar energy. 3. Commonly used for oxygenation in various aquariums, swimming pools, and ponds. Especially suitable during power outages. Increases the amount of oxygen available to fish. 4. It has a built - in 2200mAh high - capacity battery and can run for up to 20 hours when fully charged. 5. Note: If the battery runs out or is replaced, the pump can only be restarted by connecting the battery to a USB socket for 5 seconds or placing it in direct sunlight for a few seconds. 6. It can be powered by solar energy or charged. Due to the integrated input port, direct current can be used. 7. It has a built - in rechargeable battery that can store energy and work at night. 8. Advanced chip microcomputer control: constant voltage and constant current charging, overload protection, and weak - power alarm. 9. Thank you for purchasing products from our high - quality store and have a great day.