This is the excellent reissue of the Version 1 Big Muff, affectionately known as the "Triangle Muff", with a faithful recreation of what made the original pedal so special - and some modern upgrades as well. The pedal nails that creamy violin-like sustain that has been heard on countless guitar solos. The reissue now features an LED to indicate effect status,true bypass switching and the option of being powered by a 9-volt AC adapter. Plus - the enclosure is way more pedalboard friendly!