Electro-Harmonix English Muff'n Tube Overdrive Pedal<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> True bypass using a mechanical relay </span></li><li><span class="a-list-item"> Dual vacuum tube preamp dedicated to a true tube overdrive </span></li><li><span class="a-list-item"> Supplied with two Electro-Harmonix 12AY7 tubes </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/51cuPyATjIL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41pGkTzJBOS.png" noproxy>