Banish dry air and replace it with cool, humidified air -- almost anywhere you go. Perfect for office, home or travel, our personal ultrasonic humidifier quietly issues a cool mist that improves air quality and helps moisturize skin. Simply use your standard water bottle (two bottle adapters included), and it will run for up to 12 hours without refilling. Add a few drops of essential oil (not included) and you can use it as an aroma dispenser, too. Uses DC adapter (included). Comes with convenient carrying bag. 4 3/4" l x 2 3/4" w x 3 1/4" h.