The Filtrete Allergen, Bacteria & Virus Smart Air Filter attracts and captures microscopic particles like bacteria, particles that can carry viruses, and large particles like mold spores and pollen. Its Bluetooth-enabled sensor pairs with the Filtrete Smart App to help track filter life and determine optimal time for replacement. With Amazon Dash Replenishment, your Filtrete Smart Air Filter can automatically place an order for new filters when it's time for a replacement.