"Genuine Blueair replacement filter compatible with Protect 7470i and 7410i air purifier models. Our most advanced filter technology, SmartFilters are designed to deliver superior performance with data-based filter lifetime tracking, a smart RFID chip, and longer filter life (maximum of 1 year). The combination Protect 7400 SmartFilter features a particle filter layer to remove airborne particles like pollen, dust, mold spores, pet dander, viruses and bacteria, fine smoke particles and more. The activated coconut carbon layer absorbs gases, Volatile Organic Compounds (VOC), chemicals, odors, exhaust and more. Accurate filter life tracking helps you get the most out of your Protect 7400 SmartFilter and eliminates unnecessary replacement with an algorithm to calculate filter life based on fan speed, particle sensor data, and estimated filter loading. View data anytime via the app. The booklet design traps in pollutants, maximizes the filter surface area, and helps prevent premature clogging. Fold your SmartFilter together like a book to minimize exposure to pollutants during replacement. Once replaced, the air purifier will recognize the new filter’s RFID chip and automatically reset your filter life status. Your SmartFilter will last a maximum of one year depending on room conditions. To ensure performance, replace your filter when alerted by the air purifier and/or app that replacement is needed.