i sell yamaha mu-100r prof. synthesizer module in very good condition, it has two expansion boards inside - plg100-vh "vocal harmony" and rare plg100-sg "formant synging", this powerfull sound module also can be used as external multi-effect processor, harmonizer/vocoder! for european owners i can include 220-240v power adapter. additional i attach a copy of yamaha factory cd-rom for this product with - demo midi files, songs, pc-host cbx driver and preload performance data! shipping worldwide - usa/canada - $80, europe - $60 by insured airmail with tracking