OPTI-UPS ES550C UPS<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Powerful On-Board AVR (Automatic Voltage Regulator) to regulate/correct AC input voltage </span></li><li><span class="a-list-item"> 1050 Joules Surge Energy Rating; RJ11 &amp; RJ45 Protection </span></li><li><span class="a-list-item"> 4 Hours Battery Recharge Time &amp; Easy Battery Replacement Procedure </span></li><li><span class="a-list-item"> Clear LED Status Indicator &amp; Audible Alarm </span></li><li><span class="a-list-item"> Self-Diagnostic &amp; Smart Power Management Software </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/4114aW53WmL.jpg" noproxy>