Roland A49BK MIDI Keyboard Controller - Black<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Lightweight and compact </span></li><li><span class="a-list-item"> Easy to use </span></li><li><span class="a-list-item"> Two knobs， two switches， and D-BEAM controller </span></li><li><span class="a-list-item"> USB bus powered; no AC adapter required </span></li><li><span class="a-list-item"> Pearl white and black finishes </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41jRIQj8%2B2L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41Y37qmsQkL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31GSF2eAs6L.jpg" noproxy>