Mini/Portable USB Humidifier | Help get rid of unpleasant odors and purify your air with this Mini Portable USB Humidifier. Doubling as an aroma diffuser, it is conveniently compact for travel to ensure you can breathe easy on-the-go. Easily refillable tank holds 2 ounces of water and only takes up 3.5 inches on your counter while helping to purify more than 150 square feet of space. Perfect for even the slimmest nightstand. Covers more than 150 square feet. Works on low power via a USB.