Mesa Boogie V-Twin valve preamp pedal (Mark 1) 

Powered by two 12AX7 valves 
Bypass Switch 
Channel switch 
3 modes (Clean, Blues & Solo) with 2 Channels selectable by footswitch - either Clean & Solo or Blues & Solo 
Mode assignment button (Clean/Solo or Blues/Solo) 
Gain, Master, Bass, Mid, Treble and Presence controls 
Record/Headphone Out 
External Switching Inputs 

This pedal is in good condition for its age, however the Solo mode LED is missing (see photo). All three channels work perfectly. The pots all work as expected, however a couple are slightly scratchy in places, but this does not hinder the performance. I've cleaned them up as best I can with electrical contact cleaner. 

A brand new voltage/current-correct aftermarket power supply is included. 

There are numerous demo videos of the V-Twin on YouTube, please check them out if you have never heard one before. 

Shipping includes insurance.