An MFP establishes a first communication link L1 by receiving an activation command and sending an OK command. The MFP receives first target data from a portable device by using the first communication link. The MFP generates second target data by processing the first target data. After receiving the first target data, the MFP disconnects the first communication link. The MFP establishes a second communication link by receiving the activation command and sending the OK command. The MFP sends the second target data to the portable device by using the second communication link.