Welcome, you are looking at a great piece.
This is the DOD FX25 Envelope Filter Electric Guitar Effect Pedal.
DOD pedals were made right here in the USA and have stood the test of time.
This Envelope Filter is very intuitive- just 2 knobs, range and sensitivity.
This pedal is in very good condition as you can see in pics- typical marks from normal use.
Tested and works as it should.
This is your chance to add some vintage DOD to your pedalboard.
Don't pass this by!