The product is a set of 4 HEPA replacement filters compatible with the HoMedics AR-OTFL model. These filters are made by Life Supply USA and are designed for use in air purifiers to improve indoor air quality. The filters have a white color and are made of plastic, with a True HEPA filtration technology. They are compatible with Bluetooth and Bluetooth Low Energy (BLE) smart home protocols. With a pack of 2 boxes containing a total of 4 filters, these replacements ensure that your air purifier continues to function effectively and efficiently.