Unit 1 of 2 Roland U-220 Rackmount Sound Module. Voted best acoustic piano sound of 1991, for whatever that is worth :) Many good years with this box with those great classic sounds, but I put it on the shelf years ago. Pulled it out and it does power on, but marked poor condition and priced accordingly since I cannot guarantee performance. I have a second one I am also selling. Well-packed and ready to ship!!