Elecom trackball mouse / index finger / 8 button / tilt function / M-DT1DRBK<div style="text-align: left;"><strong>[Product Information]</strong><ul><li class="showHiddenFeatureBullets"><span class="a-list-item"> index finger / 8 button / tilt function </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/51j7nT28AGL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51j7nT28AGL.jpg" noproxy>