Xiaomi Air Purifier
Xiaomi Air Purifier 2C - no WiFi / Smart
Xiaomi Air Purifier 2H
Xiaomi Air Purifier 3H / 3 - higher air flow, lower noise, better PM meter, touch button
Xiaomi Air Purifier 2s - button
Filters
HEPA12 - 99,50% efficency
HEPA13 - 99,97% efficency
Blue - HEPA12 - standard for 2/2S/PRO. 330 g activated charcoal
Green - HEPA12 - two filters, external and internal with 330 g activated charcoal
Violet - HEPA12 - 330 g activated charcoal
Grey/Black - HEPA13 - 330 g activated charcoal