This is the original (non midi) version that is in perfect working order. You can see from the photos that it has pedalboard tape on the back instead of the rubber feet so is ready to be mounted on a board.

Original box.

Masterful control for multi-amp rigs and professional effects setups.

Mode 1 lets you switch between 3 amps. The signal is routed (without semiconductors) directly via gold-plated relays to 1 of the 3 outputs: A, B, or C. The other 2 outputs are muted.

Mode 2 lets you plug in your effects chain to the second amp so that button B provides a dry signal to the amp and button C sends a wet signal to the amp (with the effects chain engaged). 

Can use any power supply between 8 and 20V with either polarity (AC or DC). The supply voltage is internally rectified and stabilised in order to guarantee trouble-free operation. High-intensity LEDs behind a magnifying lens makes it easy to read switching state (A, B, or C) even under bright spotlights.

Features

2 modes
Mode 1: switch between 3 amps
Mode 2: effects chain routing tool
Uses any power supply between 8V and 20V either AC or DC
High-end switching for any situation.