From ROSS/JHS:

The ROSS Distortion is an op-amp hard clipper built around the classic 1970s topology seen in pedals like the MXR Distortion Plus, the DOD 250, the Proco RAT and the BOSS DS-1. While this pedal can be used in almost any situation, it excels at creating natural tube-like overdrive distortion and pushing your amplifier into natural breakup.

Welcome to a new era of ROSS pedals. After countless hours of painstaking research and design, this pedal brings you the story, legacy and sound that made the original ROSS brand a timeless staple for guitarists and collectors worldwide. Featuring five classic ROSS circuits, this series offers something for every player. Each pedal is manufactured in a classic ROSS enclosure style at the JHS Pedals facility in Kansas City, MO, using the same stringent quality standards you’ve come to expect. Notable improvements over the vintage units include soft touch bypass, lower noise and a mode switch with two settings for added versatility. 

CONTROLS

“Level” controls the volume (right is louder, left is quieter). “Distort” controls the amount of hard-clipping distortion (right is more distorted, left is less distorted). The side push switch allows the player to toggle between two different versions of the circuit produced during its fifteen year history: Germanium mode ( “Era 2” version) and Silicon mode ( “Era 3” version). The footswitch activates the pedal via soft touch bypass switching and the status LED indicates that the circuit is active.

JACKS

The ¼” input and output jacks connect your guitar and amplifier. The power jack accepts standard 9V DC Negative Center power and consumes 40mA.