【Filter】DCV501HB Filters use high-efficiency filtering technology to absorb everyday contaminates affecting the purity of your air. Helps capture airborne particles as small as 0.3 microns with up to 99.97% efficiency. Easily captures dust, wood chips, small particles, fine powder, and sawdust. 【Reusable & Washable】After cleaning with water, allow the filter to air dry completely for at least 24 hours before placing it back into the handheld vacuum. We recommend cleaning it monthly for optimal performance. Additionally, for maximum efficiency and cost-effectiveness, we suggest replacing the filter every 3-6 months or based on your usage frequency