Joyo R-03 Uzi

Specially designed for heavy metal, it’s characterized by High Gain. With a BIAS knob, you can switch easily between American Distortion and British Distortion. Meanwhile, UZI has a GAIN Control Knob and a VOLUME Control Knob, both are of dynamic balance, adjust the GAIN knob while don’t adjust the VOL knob, the signal from the circuit will adjust automatically, ensuring the Volume is the same as before.

Controllers: Volume, Gain, Bias, Low, Mid, High, LED Toggle
With no battery compartment