Rhythm arranger with a variety of rhythm patterns. - Model Name: Rhythm Arranger - Brand: 1979 Roland - Color: Wood grain - Functions: 18 rhythm variations including 6 rock rhythms Total of 27 rhythms including 9 rhythm selectors - Button Type: Multiple rhythm patterns - Adjustment: Volume, balance, tempo Thank you for viewing. This is the Roland Rhythm Arranger TR-66. It's in good condition despite its age.