Water-saving: Foaming device can make the water and air flowing through fully mix, forming the effect of foaming, improving the scouring force, thereby reducing water consumption. The faucet installed with the foaming device saves about 50% water than the faucet without the device. Anti-splash and noise reduction: The water flow is gentle after mixing with air, the impact force is reduced, the water column after buffering is uniform, and the water column reduces the splash vertically. Filtration: Multilayer filters can filter most sediment and impurities, and internal grids can filter impurities of large particles (occasionally blocked, need to be cleaned). Constant flow/discharge: With pressure compensation or current limiting devices (commonly used in sprinklers) can ensure a certain amount of water when the water pressure is too low, limit the amount of water when the water pressure is too high, and stabilize the amount of water when the water pressure is unstable.