Features: Using silver ion technologys to effectively kills bacteria, viruses, and fungi. Suitable for X10, S10, W10S, S20, and X20 series products. Slow-release silver ion module, will continue to release silver ions into the water to inhibit bacteria up to 99.9%. As cleaning proceeds, silver ions also continue to transfer to the floor and waste water tanks, providing peace of mind during whole houses cleaning, freshs water storage, mop washing and waste water recycling. Easy to install and operate. Recommended replacement cycle of 12 months to ensure antibacterial effect. Suitable for places that need to improve indoor air qualitys, such as bedrooms, living rooms, etc. It can be used in public places such as schools, libraries, hotels, etc. to provide a clean environment. Specifications: Material: Plastic Size: As Shown In The Picture Package Includes: 1x Antibacterial Module note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.