This product is ecological chain brand product, there is no any marks on the products, please note it. Feature: -It is designed with high-quality PP cotton filter and from reports. -The Smartmi smart toilet seat is equipped with a filter but this filter has a six-month lifespan. -This product is a water filter which can effectively filter out sediment and other impurities from going into the toilet. -Extended use will affect the filter’s performance resulting in reduced water flow, low filtered water quality, and other issues. -Users of this toilet seat can now purchase the Smartmi Smart Toilet Water Filter which can be fixed with a simple installation -procedure. -All parts of the product adopt safety and environmental protection materials, and the product has passed RoHS certification. Zhimi smart toilet filter can withstand water pressure up to 0.75MPa. -This filter is quite useful because if the running water is directly connected to the smart toilet seat, it will not only cause