A mobile electronic device two panels arranged to swivel so that the panels can swivel between a retracted position in which the two panels substantially overlap one another and an extended position in which only a minor portion of the panels overlap one another. The panels are shaped and dimensioned to define a space between them when the panels are in the retracted position. The space is suitable for receiving and clamping an item such as garment or clothing between the panels when the panels are in the retracted position, so that the device can be clamped onto a belt or other piece of garment or clothing such as a pant pocket.