Used BOSS Dr. RHYTHM SECTION DR-5 with an aftermarket power adapter. The main unit is in clean condition with no noticeable scratches or stains. The instruction manual has some dirt and handwritten comments (see photos 15 and 16). The internal button battery has been modified to a socket for easy replacement, and the battery has been replaced (see photo 12). Operation has been confirmed as follows, with no issues: - Operation confirmed with both AC adapter and dry cell batteries. - Rhythm function and STORE function work without problems, and DEMO playback is also fine. - Audio input/output via OUTPUT jack and Phone output is working without issues, no scratchy noise. - Each pad operation and VOL operation work without malfunction. The power adapter is a third-party 9V 0.25A, but it works without problems compared to the original 9V 0.2A. ＜Product Contents＞ ・BOSS Dr. RHYTHM SECTION DR-5 Main Unit ・BOSS Dr. RHYTHM SECTION DR-5 Instruction Manual ・Aftermarket Power Adapter