The ultra-quiet Air-O-Swiss AOS U600 Warm & Cool Mist Ultrasonic Humidifier uses high-frequency vibrations to turn water into a micro-fine mist. Designed for rooms up to 650 sq. ft., the Air-O-Swiss AOS U600 Ultrasonic Humidifier gives you the option of either cool or warm mist. The replaceable demineralization cartridge ensures water mist without lime scale or mineral residues, and the Air-O-Swiss quad-band water protection system inhibits microbial growth in the water of your humidifier.

| AOS U600 Specifications | |
| Electrical voltage | 120 V / 60 Hz |
| Power consumption | 40 W (125 W*) |
| Humidity output up to | 3.5 gallons / 24 hr.* |
| Suitable for rooms up to | 650 sq. ft. |
| Dimensions (LxWxH) | 11 x 9.5 x 14 in. |
| Weight (empty) | 8.8 lbs. |
| Operation noise level | < 25 dB(A) |
| Accessories | Demineralization cartridge Hydro Stick |
| * when used with pre-heating to 176 °F | |