This round led fan is made of plastic and measures 5.89 inches*3.79 inches*5.77 inches.It's powered by USB and several groups of letters,numbers and symbols can be programmed with it.Simply switch on the fan by pressing the on button,it will come into operation and message will be played in a loop.Custom your logo or slogan on fan housing and hand out this terrific desktop necessaries to resuce your customers from hot summer and help your brand has an access to their offices.