The APC Smart-UPS SRT 2200VA/1980W is an online (double-conversion) UPS — a step up from a line-interactive design like APC's other Smart-UPS models in this catalog — providing continuous, regulated power to connected equipment with effectively zero transfer time during an outage, which matters for the most sensitive server or networking gear. It's a 2U rack-convertible tower unit with a VRLA battery included, though it doesn't ship with rails (the SRTRK4 rail kit is sold separately) or a network management card by default. Warranty covers 3 years repair-or-replace on the UPS itself and 2 years on the battery, standard APC terms for this SRT online-UPS range.