Vintage DigiTech RP7 Valve guitar multi-effects processor is a blue metal floor unit with a built-in expression pedal. It has a 12AX7 tube preamp, integrated tuner, and various digital effects including distortion, modulation, delay, and reverb. The unit includes the original user's guide and factory box. The rear panel features input, headphone, and stereo output jacks, along with a 9VAC power input.
Several YouTube videos are out there with demos, etc.
I used it to replicate everything from backwards solos to U2 sounds to the Black Crowes.