H13 True HEPA Filter for VOOPNU Air Purifier, 3 in 1, H13 True HEPA with High efficiency Activated carbon and Pre-Filter, 4 Pack

["COMPATIBLE: H13 True HEPA Filter Compatible with VOOPNU Air Purifier.","Package Includes: 4 Pack H13 True HEPA Filter.","3-IN-1 Filtration System: The H13 True HEPA filter is used in conjunction with a high-efficiency activated carbon and charcoal pre-filter.","Usage advice: The filter should be placed in a dry place. We recommend replacing the filter every 6-12 months.","Satisfactory service: Customer satisfaction is our priority. If you have any questions about your filter, please contact us. Our support team is always here to help."]