Please inquire via chat about any included bonuses before purchasing. This item has various uses, including live a cappella recordings, instrument effects like guitar, and beatbox loopers, greatly expanding creative possibilities. Usage history: Approximately six months and a few months since purchase. Attempted to use as a loop station, extending beatboxing. Repair history: The knob response was concerning, so it was maintained by BOSS official support. Since my interests shifted during that time, it has been mostly unused and stored at home. This is a discontinued model, making it rare on the market. Note: This is not the successor model "RC-505mkII". Retail price: Approximately 58,000 yen Storage environment: Non-smoking / no pets environment Lightly disinfected with ethanol Officially maintained Sound and operation confirmed ＜Included Items＞ ・RC-505 unit ・Power adapter ・Instruction manual ・Outer box ＜Bonus 1＞ ① One stereo phone conversion plug (necessary for connecting headphones/earphones) ② Red and white audio cables (necessary for connecting to an audio interface, amplifier, etc.) Both purchased at a musical instrument store ※Images 10 and 11 The instruction manual is folded, but there are no issues with readability (Photo 8). Also, the instruction manual data is available online from the official website, so it's not necessary. Please understand that this is a used item, so there may be scratches and age-related deterioration (see photos). Data will be initialized before shipping. Feel free to comment if you have any questions. Instant purchase is OK. I am not planning to list this for a long time, so I hope to sell it to someone who is interested.