Keeley Bubble Tron

Very cool and unique filter/modulation pedal designed around some of Frank Zappa's favorite vintage sounds. Covers auto-wah, envelope filter, and phaser-style effects, with everything from subtle movement to funky quack and completely off-the-wall textures. Works great and is in excellent condition. Velcro on the bottom, but I'm happy to remove it before the sale. Would consider trades. Mainly looking for a Boss FZ-1W.