It's a custom distortion pedal with a very high gain distortion. It emulates the sound of a “Mesa Boogie Dual Rectifier ”

The device has the following features:

Gain control
Bass control
Middle - knob
Treble knob
Presence control
Vol - control (effect volume)
Connection socket for 9V DC power pack (minus outside)
Bright LED as a control for effect on

This Dr. Boogie is a real kneebiter. and screams one’s head off !!  The EQ works also very well. No scratching or creaking of the pots.