3000 VA / 2700W Pure Sine Wave UPS battery backup Smart-UPS Extended Run Option: Extended-run models accept external battery packs (model SMX120BP, sold separately) for a longer runtime during prolonged outages, to power critical servers, security and communications systems Input: NEMA L6-20P. Output: NEMA L6-20R (2), IEC 320 C13 (4), and IEC 320 C19 (2) Output: 208V (configurable to 220V, 230V or 240V nominal) Tower. 4U Rackmount convertible (rail kits sold separately, part# AP9625)