From Boss:

“With the SY-1, its never been easier to infuse your creative arsenal with BOSSs legendary guitar synth technology. This amazingly expressive tool is filled with 121 ultra-responsive sounds, all distilled down into a BOSS compact pedal that slides easily into any setup. Best of all, its as simple to use as a standard stompbox, so you dont need any background in synth programming to bring a new world of sonic textures to your music.”

Brand new.