The Dreame RSI0 Silver Ion Sterilizer and Filter kit is designed to maintain the hygiene of your cleaning system by releasing silver ions into the water. This process provides antibacterial sterilization with a rate of 99.9%, ensuring that the water used during the cleaning cycle remains sanitary. This maintenance set includes both the filter and the silver ion sterilizer module, making it compatible with a wide range of Dreame vacuum cleaners and mops. You can use this kit if you own models such as the L10s Ultra, L20 Ultra, X30 Ultra, X40 Ultra, or the newer L50 and X50 series, as well as the GoVac 500 and various L40 iterations.