It's based on the Hugger dual boost loop. This has no loop and a single switch with a toggle that controls the amount of boost. This has a lot of boost on tap, It has plenty of boost to punch through in choruses or end of songs. It's pretty transparent and takes very little board space. I got this from a great fellow TBer a great little pedal in great shape $35.00 I will ship to Conus and Canada only please thanks for looking.