1. Use multi-layer HEPA filter paper to effectively filter PM2.5, bacteria, formaldehyde, haze, pollen, dust, secondhand smoke and other harmful substances 2. Upgraded high-density modified activated carbon layer to quickly absorb formaldehyde, TVOC, kitchen fumes, smoke and other harmful gases and odors, and keep the air fresh for a long time 3. Designed specifically for Xiaomi Air Purifier 4 Compact model, easy to install. 4. Anti-deformation frame structure, no collapse after long-term use 5. Note: Not Xiaomi official accessories, third-party compatible products
