Memkey - Waterproof Solar Swimming Pool Oxygenator - 2200mAh Air Pump - 100° Foldable Solar Panel - Energy Saving and Eco-Friendly

Powered by solar energy, no battery or electricity needed, energy saving and eco-friendly. Made of high quality and durable ABS material. 100 degree foldable solar panel, easy to adjust a better angle to absorb solar energy. Built-in 2200 mAh high capacity battery, it can work long time up to 20 hours once fully charged, meanwhile, this air pump can be charged by DC power with a cable USB.The internal circuit adopts imported single-chip microcomputer intelligent control, supports constant pressure and constant current charging, overcharge discharge protection and low electric alarm, safe to use.