Electro Harmonix OD Germanium Overdrive-Battery Included, 9.6DC-200 PSU Optional Type_Strap or a stereo keyboard output

or a stereo keyboard output plus a mic

Using the built-in Preset footswitch

And to go one step further

Phase Speed: Sets the rate of modulation for the phaser

It can also act as a simple PA system

Electro Harmonix OD Germanium Overdrive-Battery Included, 9.6DC-200 PSU Optional Type_Strap or a stereo keyboard outputClassic '60s Germanium transistor overdrive and more. In addition to a Gain control, the Electro Harmonix Germanium OD allows the user to control Bias for attack and the circuit Volts for that sweet spot found when a battery's voltage dips. Dial up that slightly torn speaker sound OR dial in total Germanium "Satisfaction."