Solar Aerator Aquarium Fish Tank Oxygen Pump for Swimming Pool (Black Two Piece) describe: The solar oxygen pump has a built-in 3600mAh lithium battery to store energy, so the oxygen pump can also work at night. Just place the solar panel in a sunny spot and it will start up automatically. Suitable for small and medium tank, outdoor aquarium or water tank etc. characteristic: 【Solar Energy】Using solar energy, environmentally friendly, portable, easy to install, no wiring, no running costs, maintenance-free, solar energy is safer for your children. 【Even Air Distribution】Three working modes can meet your different needs, and two airflow points ensure air distribution is more even and uniform all over. 【Adjustable Angle】The angle of the solar panel can be adjusted to make the sun the strongest. Perfect for bird baths, small ponds, garden decoration, oxygen water circulation and more. 1 Set Black ABS+PET Laminated Air Pump Solar Kit Solar Swimming Pool Pond Fish Tank Oxygen Air Pump Fish