In the words of JAM Pedals:

We pulled out all the stops to make sure the Rattler will get you all the amazing tones of great early 80s ProCo RAT distortion boxes and put in the time and R&D to make it more responsive to picking and fretting nuances resulting in an open, dynamic, overdriven tube-amp feel!

Its asymmetrical clipping circuit, carbon comp resistors and of course the legendary NOS LM308N chip, the featured star of this design, are the main ingredients of a great recipe resulting in the Rattler shining through any rig, whether modern or vintage.