Electro-Harmonix Bass Big Muff Distortion Pedal<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> On/Off switchControls for Volume， Tone， and SustainDual outputsMini Switch for Bass BoostRugged metal chassisRuns on 9 volt battery or optional AC Adapter (sold separately). </span></li><li><span class="a-list-item"> The Bass Big Muff Pi Pedal features controls for volume， tone， sustain， dual outputs (effect and dry for recording)， and a mini switch for bass boost </span></li><li><span class="a-list-item"> The Electro-Harmonix Bass Big Muff Pi Distortion Pedal is powered by a single 9-volt battery or optional AC power supply (sold separately) </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/51zc5dFb4sL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51uWaHGD7TL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41q4zAG0RfL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/412Vxpr0avL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/71F-YGu1sxS.png" noproxy>