Make from, this silver module ensures long term stable output and stable purification This silver module accessory is precisely designed for M40S Robot It fits perfectly into previous water tanks systems, ensuring stable and stable operate without affecting normal cleaning modes or suction power : The silver module is designed for quick installation and replacement, allowing users to easily complete maintenance at home The silver module continuously releases active silver ions into the water, helping to purifies and fine particles in the water flows It helps purifies and clean stain in water, reduces scale buildup in tanks, and is widely suitable for household daily use to maintain a healthier cleaning environment