Detailed replacement filter (MPN: DVK9) from DREAME. It includes four filtration levels: pre-filter, composite H13 HEPA level, activated carbon level, and formaldehyde catalytic level. Designed to capture fine particles (PM2.5, dust, pollen), bacteria/viruses, odors, formaldehyde, and TVOC. Compatible with DREAME AirPursue PM20 devices (and the PM10 series). Recommended replacement interval: 6–12 months depending on air quality and usage. Tool-free, easy installation with the magnetic mounting system.