Mad Professor Golden Cello. This is a really cool pedal with amazing effects. I remember when I bought it a few years ago it was described as that sweet violin tone, but it has lots of different tones and effects. I ended up with several other units and I have too many, plus I am moving so its up for sale. I really only plugged it in 2-3 times, so it is virtually brand new. I am in the process of moving and cannot find the original box.