This is a used YAMAHA FB-01 FM SOUND GENERATOR. It has some scratches, rust, and dirt, but it is in relatively good condition for its age. The unit's memory has been initialized. Reference: The initialization operation is "Simultaneously press SYSTEM SETUP + INST SELECT + DATA -1/NO while turning the power ON." The following operations have been confirmed and are working without problems. Please note that other detailed operations have not been checked. ・Confirmed that the display works without problems when the power is turned on. ・Confirmed that audio output is produced from the AUDIO OUT when a MIDI signal is input. ・Confirmed that there is no scratchy noise from the Audio OUTPUT when connecting a shielded cable. ・Confirmed that each switch operates correctly and responds without problems. Regarding the power cable, part of the insulation was torn, so it has been reinforced with a glue gun and electrical tape (see photo 11). ＜Product Contents＞ ・YAMAHA FB-01 FM SOUND GENERATOR unit