This product is a solar-powered low-voltage direct current electrical device, safe and efficient (adults and children can directly and for a long time come into contact with it). Working principle: The highly efficient solar panel built into this product generates direct current to excite the anode rod, which electrolyzes anions and copper ions into water. The ions quickly break through the outer walls of bacteria and algae spores, thereby achieving a rapid and efficient sterilization and algae suppression effect. 100% free of chemical agents, natural and non-irritating, providing efficient and long-term protection for water quality.