Roland A-500PRO Keyboard Controller<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Velocity-sensitive 49 keys with channel after touch </span></li><li><span class="a-list-item"> 45 assignable controls: knobs， sliders， buttons， transport and more. 8 Dynamic Pads for finger drumming and MIDI triggering </span></li><li><span class="a-list-item"> USB Bus Powered - no AC adaptor required (AC adaptor is an optional). Bundled with the Cakewalk Production Plus Pack including three incredible instruments and production software </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41XFC75eJrL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41ByKvTfirL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/413EWOrJvXL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31GBUXbu8rL.jpg" noproxy>