What is sustainer pedal?

A sustainer pedal is a type of guitar effects pedal that is used to create a continuous and sustained sound that mimics the sound of a bowed instrument. When the pedal is pressed, it sends a signal to the amplifier or sound system, which sustains the sound of the guitar for as long as the pedal is held down. The pedal is commonly used in genres like rock, metal, and jazz to create atmospheric and ambient soundscapes, as well as to add texture to guitar solos. Some sustainer pedals have additional features like octave effects, which can be used to create a harmonized sound.