What Started out as a lo-fi delay project has turned into quite a very nice clean delay! Works great with any instrument. This case design is intended for synth users, but will work with a guitar, or really anything (a stomp box version will be out very soon!). Based upon the PT2399 IC, but filtered nicely with our own personal flavor to produce a clean sound. Product is fully assembled and tested. THIS ITEM USES A CENTER NEGATIVE AC ADAPTER (not included) or 9V battery. Enjoy! SHIPS FREE IN THE USA!