This is an Electro-Harmonix Triangle Big Muff Pi guitar pedal, a faithful reissue of the classic 1969 circuit. It delivers that iconic, smooth, violin-like sustain and fuzz tone that has been a staple in rock and roll for decades.

The pedal is in excellent condition and fully functional. It's ready to add a powerful and distinctive distortion to your sound. Perfect for guitarists looking for that vintage Big Muff sound.