A Swiss Army knife of a modulation pedual: flanger, phaser, and envelope filter all in one! In addition to their "standard" modes, each effect also has a wild second mode: the phaser and flanger have dynamic modes, responding to the attack of your playing, and the filter has a random/sample-and-hold mode (like the old Maestro FSH-1). Though it's a guitar pedal, it works equally well on bass (no loss of low-end), drum machines, pretty much whatever you throw at it. This pedal is in mint condition, has always been in a smoke-free home studio since it was purchased four years ago. Works perfectly, zero wear-and-tear.