The Genius Air Plus Refrigerator Refresher and Deodorizer uses ionization technology to capture contaminants such as odors, moisture, bacteria, and chemicals. It operates on 4 AA batteries and features a digital display, wireless capability, and quiet operation. No filter or timer control means easy maintenance and a reliable choice for maintaining fresh air in your environment. NWOT; never used. See pics for condition as they are part of the description. Due to differences in lighting, monitors, cameras, etc., you may see color variations and reflections. Please ask questions before purchasing. All purchases are video recorded during the packing and shipment process.