This is a used rack mount unit that functions perfectly.The DigiTech GSP2101 is a world class studio and guitar processor/preamp built with a 24-bit signal path and 48-bit internal data path. Features tube and solid state distortion, digital and analog EQ, 2-12AX7 tube preamp, programmable algorithms, built-in effects that can be run in tandem including Whammy and Chromatic Pitch Shifter. There are 140 factory preset effects and 100 user programable effects some of which were created by some very well known artists. Effects include delay, reverb, chorus, pitch shift, harmonizer, tremelo, compressor, and so many others. Many of the presets use combinations of the effects.
This unit has the Artist 3.00.00 upgrade. The Control One foot controller has 10 foot switches for effects, a bypass and tuner foot switch, and a wah/whammy pedal. $399 or best offer.
Here is a demo of various different effects: https://www.youtube.com/watch?v=vtRPFu-Xt00 Pretty amazing!