Air Multiplier™ purifier fan technology projects a powerful stream of smooth, uninterrupted, purified air. Cooling tower fan when you need it. Dual functionality The Dyson Pure Cool Link™ tower purifier fan purifies year-round. Cooling fan in summer. Second generation filterCaptures ultrafine particles from all angles, including pollen, bacteria and pet dander. App connectedAutomatically monitors, reacts and purifies – then reports to your Dyson Link app. Standard data and messaging rates may apply. Certified Asthma and Allergy friendlyDyson purifiers are certified asthma and allergy friendly by the Asthma and Allergy Foundation of America. Parent Tested Parent ApprovedAwarded the PTPA seal of approval. The seal of approval families trust. Air Multiplier™ technologyAmplifies surrounding air, giving an uninterrupted stream of purified airflow. Night-time modeMonitors and purifies using the quiet settings, and with a dimmed display. Auto modeAutomatically monitors air quality, adjusting airflow, and turning on and off accordingly. Voice controlUsing Amazon Echo, control your Dyson purifier with simple, spoken instructions. All you have to do is ask. Safe, and easy to cleanNo fast-spinning blades, or awkward grilles. Smooth oscillation Projects and circulates purified air across the room. Remote controlCurved and magnetized to store neatly on the machine. Quality refurbished by Dyson with 1 year Dyson warranty. Note: Colour may vary Dyson refurbished machines are different. Each machine has passed a detailed inspection and hundreds of tests, to meet the same standards as a new machine. Units may have some minor cosmetic blemishes that do not affect functionality. So when Dyson say they're 'like new', they mean it. Dyson are solely responsible for any concerns with their refurbished units, once opened we are not able to offer any returns or exchanges.