3-in-1: Purifies all year round, can heat the whole room or cool you as a fan<BR>HEPA filter removes 99.97% of allergens and pollutants as small as 0.3 microns. Active carbon layer captures odors andharmful toxins<BR>Automatically monitors and reacts. Dyson Link app provides real-time air quality reports and allows you to remotely control your machine from your smartphone<BR>Only Dyson purifier heaters have Jet Focus Control for focused or disused airflow<BR>Has auto mode, sleep timer, night-timemode and an easy-to-clean aperture<BR>