It’s a pen,It’s a projector,It’s a pendant. Press button to project an image on any flat surface. Instructions 1.Store discs in the storage clip and slide it into the pen cap. 2.Turn ring to unlock the slide disc inside the pen projector. 3.Push the slide disc out of the storage clip and change slide disc inside the projector. 4.Press button to project and turn the lens to adjust the focus of the image.