Roland CR-80 Human Rhythm Player Drum Machine w/ Power Supply Works Great!

Roland TR-626 Rhythm Composer Drum Machine Very Good Tested w/ Power Supply

Boss DR-880 Drum Rhythm Machine with Power Supply

Boss DR-220A Dr. Rhythm - Vintage Digital Drum Machine

Alesis SR-16 16 Bit Stereo Drum Machine with Power Supply & Manuals - TESTED

Roland CR-1000 Digital Drummer~ MIDI Rhythm Machine, no power cord

YAMAHA RY20 Rhythm Programmer Drum Machine with BOX

Roland R-5 Human Rhythm Composer Drum Machine NEW INTERNAL BATTERY