A device for forming stacks of sheet products, in particular of paper products, may include the paper products being supplied in an input stream by a feed conveyor to a transfer section. A sender client enables a first user to identify message data, a recipient identifier, and a media element from the database of media elements. The decorating member and one of the casing body and the lid have a restriction section at a position away from a fitting plane position of the casing body and the lid in a fitting direction. In order to simultaneously process a plurality of wireless devices having different symbol rates, it is preferable to provide the transmitter, the receiver, and the PLL for each reference clock. The pattern appears since the integration carried out by the eye at the moment of display of the images is not correct.