Sharp EL-510RNB Engineering/Scientific Calculator<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>160 Scientific Functions</li><li>Twin Powered， Solar and Battery</li><li>D.A.L. Entry， Enter Equations Exactly as Written</li><li>Playback and Editing Functions including 1 independent memory and Last Answer Recall</li><li>Protective Hard Case</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41ejS33cqCL.jpg" noproxy>