BOSS Dr. Rhythm DR-55 for sale. Body only. No box or manual included. Operation confirmed with 4 AA batteries. There is some scratchiness when turning the volume knob near the MAX position. No issues during performance. Both PLAY and WRITE functions worked. This item was released in 1979, so please be aware of minor scratches, etc. Please also note that this is a layman's inspection. The BOSS Dr. Rhythm DR-55 is a rhythm machine that allows you to adjust volume, tempo, and tone, and offers a variety of rhythm patterns. - Model: DR-55 Drum Rhythm - Brand: BOSS - Functions: Volume, Tempo, Tone, Accent adjustment I am also selling other BOSS equipment! We may be able to offer a small discount for combined purchases, so please feel free to inquire. #sound #audio #retro #Showa #boss #rhythmmachine #rhythmbox #music #equipment #drums #vintage #drumrhythm #drrhythm