IoT Xiaomi Releases Xiaomi Air Purifier 4 Series to Take Care of Your Allergy Troubles AIT News Desk Apr 11, 2022 Xiaomi released the Xiaomi Air Purifier 4 series -Xiaomi Air Purifier 4 Pro, Xiaomi Air Purifier 4 and Xiaomi Air Purifier 4 Lite - to purify PM10 and…