Food Powered by solar energy, no batteries or electricity. necessary, energy saving and eco-friendly. Made Made of high quality ABS material. and durable. Foldable solar panel 100 degrees, easy to adjust a better angle to absorb solar energy. High capacity battery Built-in 2200mAh battery, can work for a long time up to 2000mAh. 20 hours once the pump is fully charged. During this time, this pump will last for 20 hours. Air can be charged by DC power supply with USB cable. The internal circuit adopts the intelligent control of imported single-chip microcomputer, supports constant pressure and constant load constant current, overload discharge protection and low electric current alarm, safe to use. use.