An external connection unit to be mounted to a wireless device, the external connection unit being adapted for wirelessly connecting to an external device, the external connection unit having: a first connection mode in which the external connection unit is wirelessly connectable to a wireless LAN router; and a second connection mode in which the external connection unit is wirelessly connectable to an operation terminal, the external connection unit comprising: a collection unit configured to collect, when the external connection unit is set to the first connection mode by a user, wireless information of one or more wireless LAN routers existing around the wireless device; a listing unit configured to generate a list of the wireless information collected by the collection unit; a processing unit (2-7, 2-8) configured to perform, when the external connection unit is switched from the first connection mode to the second connection mode by the user, a process of changing an arrangement of the wireless information on the list of the wireless information generated by the listing unit; and a creation unit configured to create first display data for displaying the list of the wireless information subjected to the process by the processing unit (2-7, 2-8), the first display data being provided to the operation terminal in the second connection mode. a first connection mode in which the external connection unit is wirelessly connectable to a wireless LAN router; and a second connection mode in which the external connection unit is wirelessly connectable to an operation terminal, the external connection unit comprising: a collection unit configured to collect, when the external connection unit is set to the first connection mode by a user, wireless information of one or more wireless LAN routers existing around the wireless device; a listing unit configured to generate a list of the wireless information collected by the collection unit; a processing unit (2-7, 2-8) configured to perform, when the external connection unit is switched from the first connection mode to the second connection mode by the user, a process of changing an arrangement of the wireless information on the list of the wireless information generated by the listing unit; and a creation unit configured to create first display data for displaying the list of the wireless information subjected to the process by the processing unit (2-7, 2-8), the first display data being provided to the operation terminal in the second connection mode. a collection unit configured to collect, when the external connection unit is set to the first connection mode by a user, wireless information of one or more wireless LAN routers existing around the wireless device; a listing unit configured to generate a list of the wireless information collected by the collection unit; a processing unit (2-7, 2-8) configured to perform, when the external connection unit is switched from the first connection mode to the second connection mode by the user, a process of changing an arrangement of the wireless information on the list of the wireless information generated by the listing unit; and a creation unit configured to create first display data for displaying the list of the wireless information subjected to the process by the processing unit (2-7, 2-8), the first display data being provided to the operation terminal in the second connection mode.