Item model number: QDD2. This circuit has been built to simulate classic "overdrive"-style tones, and it is like having four of the best known overdrive pedal and tube amp tones built right into your guitar or amp!
The Artec QDD2 is a super cool feature to add to a guitar. Having 4 built-in effects on a rotary switch is great, I love it. The only drawback is you must give up a volume or tone pot which is no big deal if you don't use them all, otherwise you'll either need to drill a new hole or use a concentric pot to replace a leftover pot. Also, the wiring instructions are pretty terrible, but it's easy if you have a basic understanding of guitar circuits.
I installed it in a Cigar Box Guitar I built and I can get the sounds I was looking for to play slide from clean to dirty. Very easy to install at a great price. I love it.