3M Filtrete Smart Air filters attract and capture bacteria, particles that may carry viruses, and large particles such as mould spores and pollen. These filters feature a Bluetooth-enabled sensor that pairs with the Filtrete Smart Air Filter app to help track your filter life and determine optimal replacement time. The filter continuously creates cleaner, fresher air for the highest standards in air filtration. With the app, you'll be able to access information reminding you of your specific filter type and size, and you'll even receive reminders about when and where to purchase replacement filters. The app is available for iOS and Android devices. These filters are for residential use only. Each item measures 16 in. x 25 in. x 1 in.