Welcome to All Music Inc's Musicdungeon. Right now, you are looking at a great piece.
This is a J. Rockett Audio Designs Uni-Verb Electric Guitar Effect Pedal.
The Uni-Verb is a painstakingly accurate photocell analog vibe based on of the original Univibe pedal with an added spring reverb. 
It is always best to have the Uni-Verb effect first in the chain and Reverb last in the chain so we have built in a loop to allow you to do so. 
Replacing the rocker switch to select either vibe or chorus on the original, a footswitch was added to toggle on the fly.
The classic version of this pedal ran at 24v using a fixed power cable. 
We have designed the Uni-Verb to run off of a standard (Negative tip) 9v feed but utilizing a charge pump internally to bump it up to 24v. 
This way you can use your standard 9v input with no worries at all, no special cables or power supplies.  
It's in excellent overall condition. Fully tested and works as it should. This pedal was part of our in-store J. Rockett pedal board, and has never been sold.
This is your chance to get your hands on a great pedal from a trusted name.
We are an authorized J. Rockett dealer.
Buy with confidence.
Don't pass this by!