An electronic device has a casing with an article housing formed therein openableclosable by means of a lid. A-form crystals of 4-bromo-6-propoxy)-5-pyridazin-3-one monohydro-chloride represented by formula, which exhibit a powder X-ray diffraction pattern with characteristic peaks at diffraction angles of 8. When the path-state determining unit 54 determines that there is no path which is neither in process of data transmission nor in the prohibition period, the path selecting unit 55 selects a path which completes data transmission but does not pass through the prohibition period as a path for data transmission.