Matrix MR800 Metronome for Pendulum Simulation<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> 8 LED for pendulum simulation </span></li><li><span class="a-list-item"> fully adjustable tempo </span></li><li><span class="a-list-item"> earphone output </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/51PO4pz79ZL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31dREEfMNLL.jpg" noproxy>