used Air-O-Swiss AOS Ultrasonic Humidifier - 7135 Ultrasonic technology uses high-frequency vibrations to generate a micro-fine mist Fan blows mist into the room where it immediately evaporates adding to overall comfort Automatic shutoff Comes with an Ionic Silver Stick installed For rooms up to 650 sq. ft. Location: Falls Church it's NOT ok to contact this poster with services or other commercial interests dc