I got one of these on Ebay a few years ago to play around with. Mine was used and it turned out the 9vDC power connector on the pedal didnt work so I used an adapter to convert the 9v plug to a connector I could run to my voodoo labs power supply.
The sounds this pedal can create are pretty impressive but definately a limited usage. I also found in some cases the output was so much louder than the input I had to drop my bass volume down to avoid blowing people away when I engaged this pedal.
A fun toy. Ended up taking it off my pedal board pretty quickly.
Electro Harmonix Bass Balls Nano
Bass Balls Nano - envelope?? with distortion switch, probably the worst pedal I've ever had the misfortune to own - Once read on here I think Cliff