Pigtronix Octava Micro is an expanded version of the octave up found in the original Pigtronix Disnortion pedal. This all-analog frequency doubler has an on-board low pass filter control that allows you to achieve singing octave up tones, anywhere on the neck, without adjusting your guitar’s tone control. FEATURES Analog Octave Up Variable Low Pass Filter Variable Front-end Drive Switchable High-Gain Fuzz Master Blend True Bypass Size = 3.75″ x 1.5″ x 1.75″ Runs on 9V external Power Sound design by Thomas Elliott