An alignment member is externally disposed on a toner cartridge for alignment with a developer unit in an electrophotographic image forming device. The text message may comply with a short messaging service format. The plug includes a jack and a crimping component set at a tail end of the jack, and the crimping component is configured to connect a power cable introduced from the power supply device to the jack in a manner of fixing. The bit carrier is mounted in the compartment of the body and movable relative to the body in a longitudinal direction. The inner-bottom plate holds the bottom of the portion of the casing on which the PBX section is accommodated.