Check the listing for details. Sharper Image Ionic Breeze Quadra SI925. Condition: New. Listed at 199.98 USD. The Sharper Image Ionic Breeze Quadra SI925 is an electronic air purifier designed to improve indoor air quality in any room. With a coverage area of 120 sq ft and a filtration technology of ionization, this tower-style unit offers three speeds for customizable airflow. Its washable/reusable filter life ensures long-lasting use, while the push-button control style and floor mounting make it convenient for everyday operation. Operating quietly at 10 dB, this 110V air purifier by Sharper Image effectively cleans the air in a whole room using its dust sensor technology. Unused units from Sharper Image, all packing, booklets etc, still taped and in picture box. These were unsold units that were factory inspected and sold off during their bankruptcy.