The GreenFan mini is an innovative, compact and portable fan, which produces a natural, pleasant breeze by our exclusive GreenFan Technology. When we use with our original mobile battery, it becomes a cordless fan. Our GreenFan Technology concentrates the different airflows at a single point by a dual-layer blade, and the airflows meet to eliminate swirling. Then the air is diffused as if across a flat surface, becoming airflow found in nature. GreenFan mini consumes just 2W at its lowest setting, which is one-tenth of conventional ones. And also GreenFan mini achieves its incredible quietness.