Very cool pedal. In great shape with the exception of the backside. Previous owner was getting wild with removing the dual lock - purely cosmetic.

From AE:

Introducing Artisanal Effects Meathead, a replica of the famous, expensive, coveted and long out of production Lovetone® Meatball® envelope filter. If you're looking at this listing, you know what this is, a heavyweight from the 90's-early 2000's and used by a who's who of famous musicians, from the Edge to Kevin Shields to Kirk Hammett. 

The original was itself a heavily modified revision of a Mutron III. The audio path of this replica is exactly the same as the original, in a more pedal board friendly size of 5.5" x 4.8", built by hand with high quality parts. The only thing that's been added is a switchable filter, a common mod that makes it work as frequency variable Q like a Moog rather than the constant Q of the original. This really only has an effect with bass, and gives you a wider palette of sounds to use and of course can be turned off to stay stock. This is certainly not a subtle effect, and is equally at home on guitar, bass and keys. Like the original, it also has an effects loop to insert a fuzz or other pedal into the envelope path, a common Lovetone® setup was to put a Big Cheese® in the loop.