JHS Honey Comb Dual Speed Tremolo<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Power: 9v DC Center Negative </span></li><li><span class="a-list-item"> Dimensions: 4 5/8" x 2 1/2" x 1 1/2" </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41lDKox2a3L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41lDKox2a3L.jpg" noproxy>