The HoMedics TotalComfort USB Rechargeable Personal Portable Ultrasonic Humidifier is a device that adds moisture to the air to improve indoor air quality. It has a tank capacity of 8.5 ounces and can cover an area of 120 square feet. The humidifier is ultrasonic, meaning it uses sound waves to create a mist. It has variable speed settings and a timer control of up to 10 hours. The device is powered by electricity and has a voltage of 115V. It is compact, with a height of 7 inches, a width of 2.5 inches, and a depth of 25 cm, making it suitable for travel or personal use. The humidifier is white in color, made of plastic, and has a matte finish. It comes with a 1-year manufacturer warranty.