Photo 1 of Core 400S True HEPA Replacement Filter Compatible with LEVOIT Core 400S Smart WiFi Air Cleaner Purifier, 3-in-1 True HEPA Activated Carbon Pre-Filter, Core 400S-RF-PA (LRF-C401-YUS), 2 Pack Original Filter

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Photo 1 of Core 400S True HEPA Replacement Filter Compatible with LEVOIT Core 400S Smart WiFi Air Cleaner Purifier, 3-in-1 True HEPA Activated Carbon Pre-Filter, Core 400S-RF-PA (LRF-C401-YUS), 2 Pack Original FilterPhoto 2 of Core 400S True HEPA Replacement Filter Compatible with LEVOIT Core 400S Smart WiFi Air Cleaner Purifier, 3-in-1 True HEPA Activated Carbon Pre-Filter, Core 400S-RF-PA (LRF-C401-YUS), 2 Pack Original Filter