Bionaire BWM5905-U Germ-Free Warm-Mist Humidifier with UV-Light Technology Warm-mist humidifier for small-size rooms or personal use Integrated UV-light technology provides 99.99-percent germ-free mist Built-in Microban antimicrobial protection; filter-free operation Runs up to 10 hours per filling; automatically shuts off when empty Measures 12-3/5 by 6-1/5 by 12-4/5 inches