Casio Advanced Scientific Calculator with 2-Line Natural Textbook Display (FX-115ES)<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"> 279 functions， including 40 metric conversions </span></li><li><span class="a-list-item"> 2-line， 12-digit Natural Textbook display </span></li><li><span class="a-list-item"> Solar Plus power with battery back-up </span></li><li><span class="a-list-item"> Slide-off protective hard case </span></li><li><span class="a-list-item"> Currently allowed on AP， SAT， PSAT， NMSQT， and all NCEES examinations. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/51yvC-iB1ML.jpg" noproxy>