The present disclosure relates to an electronic device comprising a case and a mobile terminal configured to be coupled with the case, where the mobile terminal includes a controller; a connection port provided at one side of the mobile terminal, and a first display, and where the case includes a first body configured to accommodate at least part of the mobile terminal, a connector protruding inward at one side of the first body and configured to engage with the connection port when the mobile terminal is accommodated at the first body, a second body comprising a second display, and a wiring unit electrically connecting the first body and the second body and configured to transfer a signal from the mobile terminal to the second display.