The Dyson 308033-01 Pure Cool Link™ removes 99.97% of allergens and pollutants as small as 0.3 microns. Its vacuum-sealed 360 Glass HEPA filter captures ultrafine particles from the air including pollen, bacteria and pet dander. Filters features an Activated Carbon layer, which captures household smells and potentially harmful toxins such as paint fumes. It offers dual functionality, purifies year round and cools you as a fan in summer. Connected Purification Dyson Link™ app allows you to observe and track air quality inside and outside your home and also control the product remotely. Dyson Pure Cool Link has intelligent purification; detects and automatically reacts to the current air quality in your home.