“The First Ever of Its Kind” refers to the X8 Family products of ECOVACS. These products introduce the "constant-pressure" and "instant self-washing mopping" cleaning functions for the first time among all ECOVACS series worldwide. This description is based on the internal product innovation of ECOVACS, not in comparison to other similar products in the market. "Constant pressure" implies that the roller cleaning module of the X8 Family products is equipped with a floating constant-pressure scraper. This strip can closely and constantly squeeze the mop due to its ability to float up and down. "instant self-washing" indicates that the X8 Family products can continuously spray water from the built-in clean water tank of the main unit onto the roller mop through the built-in dynamic water flow spray in the roller cleaning module. Additionally, the sewage on the dirty side of the mop is squeezed by the water-scraping strip and recycled to the sewage tank of the main unit, ensuring that the water used in the floor mopping and cleaning process is clean. The specific situation depends on the actual household usage.