Tripp Lite OmniSmart 500VA 300W Line-Interactive UPS， 120V， 6 Outlets， Tower， USB Port (OMNISMART500)<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> OMNI SMART 500 line interactive UPS system offers voltage regulation and battery support， plus complete AC and dialup/DSL line surge suppression </span></li><li><span class="a-list-item"> Supports entry level PC systems for up to 30 minutes during power failures to enable a safe system shutdown </span></li><li><span class="a-list-item"> Supports a maximum load of 500VA/300 watts for 5 minutes and a half load of 250VA/150 watts for 17 minutes </span></li><li><span class="a-list-item"> Automatic Voltage Regulation (AVR) circuits correct brownouts as low as 75 volts and overvoltages as high as 147 back to normal 120 volt levels without using battery power </span></li><li><span class="a-list-item"> Attractive black tower configuration </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41x68VSgEKL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41T7ty5t2sL.jpg" noproxy>