Tech Toc<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> Using the hips and core muscles is a key element to swimming faster and more efficiently </span></li><li><span class="a-list-item"> Ball bearing within the capsule creates an audible sound when tipped from side to side </span></li><li><span class="a-list-item"> Avoid swimming flat and learn to swim with strong hip rotation and undulation </span></li><li><span class="a-list-item"> Hear and feel the stroke rhythm and roll evenly from side to side </span></li><li><span class="a-list-item"> Provides swimmers instant feedback on stroke timing </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41zTSDJSqhL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51g%2BQidsrNL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/61hE0NREVWL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/514gNUSv%2BAL.jpg" noproxy>