Working principle: The efficient solar panel can provide direct current for the built in anode rod to electrolyze anion and copper ions and release them into the water, which can break the outer wall of bac-teria and algae spores quickly and efficiently, thus achieving the effect of sterilization and inhibition of algae. It's 100% chemical-free, efficient and eco-friendly, no irritation, a natural way to maintain water quality for a long time. Specifications: Material: ABS Cycle time: 2 hours Power: 2W Solar panel: monocrystalline Solar panel Inlet diameter: 300mm Outlet diameter: 300mm Item Size: 16 * 16 * 16cm / 6.29 * 6.29 * 6.29in Item Weight: 560g / 19.75oz Package Weight: 743g / 26.2oz Package Size: 20*19*18cm / 7.87 * 7.48 * 7.08in Packing List: 1 * Solar Pool Purifier 1 * Brush