I was extremely confused... That's why I had to do a little research. From a big question mark, answers have now emerged: Version 3H is not officially listed anywhere. Why? Because it simply does not exist... Store Switzerland: https://mi-store.ch/produkt-kategorie/home/room-climate/ - No Purifier 3 or 3H https://xiaomi-mi.com/ No Purifier 3 or 3H https://www.mi.com/ No Purifier 3 or 3H China: https://search.mi.com/search_%E7%A9%BA%E6%B0%94%E5%87%80%E5%8C%96%E5%99%A8 Here in the official store there is version 3 (without H) and version Pro H. Digitec currently only sells the old Pro version of the last generation (without H). Here is official information about THIS product: https://item.mi.com/product/10476.html?cfrom=search&selected=1193200016&pClass=c There are also the 3 different filter variants listed, Digitec only offers the expensive variants and also has wrong descriptions... Green: Filters formaldehyde S1 Violet: Antibacterial version Blue: Standard version (not available at Digitec) Pro H Filter: Standard Version (Not available at Digitec) Summary small to large: Mijia Air Purifier 3 (28-48m2) (Available Digitec) Mijia Air Purifier Pro (35-60m2) (Available Digitec) Mijia Air Purifier Pro H (42-72m2) (Not available at Digitec) Mijia Air Purifier MAX (70-120m2) (Not available at Digitec) Maybe it will help someone.