This distortion is GUP Tech's tribute to the RAT and the DRV.
It sounds a lot like a RAT. "Cut" acts like the RAT's filter and you can get a creamy sound with "Drive" at around 6-8. The internal charge pump converts the external 9V to 18 Vdc.
Power consumption: 16 mA
Voltage: 9V DC center negative ONLY.
Anything higher will blow stuff up.