You are looking at a like new Yamaha Motif ES Rack Module! It is in virtually like-new condition as I have used it maybe 4 times tops. The only reason for me to sell this incredible synth is because Im switching to solely computer programs! Here are the specs on this unbelievable machine! - Yamaha MOTIF ES Rack Module has a proprietary sound chip that includes expanded polyphony (128 notes), and effects (4 inserts in mix mode). The core voices are identical to MOTIF plus 2 additional preset voice banks and 256 user editable voices (twice the user area of MOTIF). MOTIF voices can be loaded directly into the rack via MIDI. Newly developed reverb algorithm. In 16-part multitimbral mode up to 4 voices can have their insertion effects enabled simultaneously, and each of the 16 parts has it's own 3-band EQ. Features 128-note polyphony 896 normal voice presets and 65 drum kits 256 normal voice user presets and 32 drum kits Stereo out 4 individual outs Optical and coaxial digital outs USB-MIDI MIDI I/O/T 2 MSPS plug-in slots MOTIF effects plus redesigned reverb algorithm, 4 insert effects, and 3-band EQs per part in multimode Thank you for looking and Good Luck