Using the free solar energy of the sun, UNIELEK's 12v dc fan turns that energy into a refreshing breeze. It has an innovative technique to output more air flow, giving you a more comfortable and consistent breeze. Designed to be used on a tabletop or on the floor, its height adjusts from 29 to 47 inches. This versatile fan has multiple speed settings plus vertical tilt adjustment and left-right oscillating option.