Moog MF101 Moogerfooger Low Pass Filter Effects Pedal for Guitar， Bass， and Synth - Black<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Cutoff rotary control Resonance rotary control Envelope Amount rotary control Mix rotary control Drive rotary control Smooth-fast rocker switch 2-pole/4-pole rocker switch 3-color LED to set Drive control On/Bypass switch 1/4" audio out jack 1/4" audio in jack accepts any instrument- or line-level signal Cutoff， Resonance， Amount， and Mix 1/4" jacks that accept moogerfooger EP-1 or equivalent expression pedals Envelope out jack delivers the envelop </span></li><li><span class="a-list-item"> Reach out and sweep the filter with the CUTOFF knob </span></li><li><span class="a-list-item"> Or use the ENVELOPE section to do it automatically </span></li><li><span class="a-list-item"> Or plug in one or more expression pedals or control voltages to do it </span></li><li><span class="a-list-item"> Or do all three </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41BGtZXBhhL.jpg" noproxy>