The APC Easy UPS On-Line SRV 3000VA is a rack-mount online (double-conversion) UPS, a step up in protection from a line-interactive model since it continuously regenerates clean output power rather than switching to battery only when a problem is detected — the better choice for genuinely sensitive server or networking equipment. This unit ships with an Extended Runtime Battery Pack and a rail kit for rack installation, giving longer backup time than the standard internal battery alone would provide, useful where outages regularly run longer than a few minutes. Output is via 6x C13 and 1x C19 outlets, and it carries a 2-year warranty.