Our inhouse brand, this items is without RFID below but still can be use for Gen 1 and Gen2
Estimated Durability: 3 - 6months
HEPA details:Â https://en.wikipedia.org/wiki/HEPA#Function
Activated Carbon details:Â https://en.wikipedia.org/wiki/Activated_carbon#Environmental_applications
Xiaomi Green Filter (Remove Formaldehyde Enhanced Version)Xiaomi Blue Filter (Economic Version)