Mi 3550 1C/2Pro+/2 Robot Vacuum Mop Waterproof Mat is ideal for keeping your docking station floor area clean when not in use. The transparent waterproof mat sits snuggly under your vacuum mop and docking station. After your vacuum mop has been used, the brushes underneath the vacuum may still be damp or wet depending on the type of cleaning you decided to do. The waterproof mat prevents that excess liquid on the brushes to soak underneath your docking station as it is charging. This not only keeps your device safe but you won’t need to worry about any excess liquid on the floor.