A perfect air pump to add water movement and oxygen to the aquarium to improve water health and give your fish a comfortable environment, improving the overall aquarium health. Made of high quality ABS, strong and durable. Technologically advanced design provides quiet and smooth operation. Powered by solar energy, without battery or electricity, energy-saving and environmentally friendly. Built-in 1800mAh high capacity battery, it can work for 22 hours once charged. Powerful, high-efficiency pumps meet most aquarium air needs and are designed to ensure years of reliable, trouble-free use.