Welcome to All Music Inc's Musicdungeon, you are looking at a really cool piece.
This is the Pigtronix Echolution 3 Delay Electric Guitar Effect Pedal.
Echolution 3 is a multi-tap stereo modulation delay offering a myriad of sound design options including reverse, jump, pong, modulation tempo sync, variable low pass filter, flexible signal routing and comprehensive MIDI control. 
Delay times ranging from 100ms to 5 seconds can be dialed in using the Time knob or via Tap Tempo using the left footswitch. 
A second delay tap can be set to the same length or a fraction of the main delay time to create rhythmic echoes. 
The ¾ fraction creates a dotted eight note delay, while the Golden fraction uses the sacred geometry of the Golden Ratio (.382) as the multiplier for the second tap. 
The multi-tap settings can be even further enhanced by the stereo ping pong effect, which causes the different delay taps to switch sides on each repeat.
Store up to 4 presets, unlock hidden features with the Universal Remote footswitch, and design yet unheard delay lines. 
Runs on standard 9VDC.
This Echolution is in very good overall condition as you can see in pics. Tested and works as it should.
This is your chance to add an incredible pedal to your rig.
We were an authorized Pigtronix dealer for over a decade.
Buy with confidence. 
Don't pass this by!