The KILLER V is an overdrive/vibrato pedal inspired by the California-born MAGNATONE AMP. The overdrive section is constructed using an all-analog JFET circuit, which not only captures the characteristics of the MAGNATONE AMP's preamp and power amp sections, but also faithfully emulates the compression and sag behavior of a rectifier tube. Internal voltage boosting delivers high headroom and the ultimate tube amp sound. ●Vibrato section: An all-analog LFO (Low Frequency Oscillator) is used to drive two discrete phase-shift modulation stages to achieve a ``pitch-shifting vibrato effect.'' ●B / N / M toggle switch: You can select the sound feeling of the preamp section from among Bright (B) / Normal (N) / Mellow (M). ●WET-DRY / WET toggle switch: You can choose between 100% WET signal or a mix of DRY/WET signals. "DRY/WET mode" features a dynamic phaser/vibe sound reminiscent of the original amp. Instruction manual (English) * This unit operates on DC 9V. Please note that applying a voltage of 10V or more will cause damage.