Altitude Aquamist Humidifiermaintain more optimal air moisture levels in your home or office with this affordable tabletop usb humidifier. The advantages of using a humidifier include prevention of dry skin and throats, relief of colds and fatigue, and reduction of static electricity. The rgb lights have the option of rotating at a relaxed pace between colours, or staying in static mode. 7. 8 ( l ) x 7. 8 ( h ) x 13 ( h ) cm plastic 400ml capacity misting rate: 40ml per hour