The invention provides a portable DC cooling fan that performs the dual function of a cooling fan and a sleep aid by generating air movement and white noise useful for inducing sleep. The portable device includes a DC axial fan under the control of an electrical control system that receives power through an AC/DC adapter. The electrical control system includes one or more user interface switches for selecting fan speed and optionally, selecting oscillation mode, thereby simulating the sounds of an oscillating fan without undergoing rotation. The portable DC cooling fan of the invention includes a housing having a plurality of openings on its front and rear surfaces that enable air flow through the device. The invention also provides an article of manufacturer comprising an AC/DC adapter packaged with a portable DC cooling fan of the invention.
