FA10 recreates the classic Octave/Fuzz effects of vintage Japanese pedals, offering a powerful sound by adding upper and lower harmonic overtones. Switchable Fat and Scoop tone settings provide edgy and bright or smooth, scooped-mid fuzz effects. The LED to indicate bypass/effect but also the battery condition for trouble-free performance. True Bypass. Operates with 9V battery or standard power supply (not included). Settings: Expander, level, switch fat/scoop.