Interface   1x USB 2.0 Type B Port, 1x Serial RS-232 (DB-9) Port   Software APC PowerChute Smart-UPS Bundle Output Power Capacity 1000VA / 640W  Input Power Voltage 160 - 286 Vac  Surge Energy Rating 480 Joules Surge Energy Filtering  Full time multi-pole noise  Filtering 0.3% IEEE surge let-through : zero clamping  Back-Up Time Half Load 14.5 minutes (320 Watts) Back-Up Time Full Load 5.4 minutes (640 Watts)  Weight 21.82 kg Battery Type Maintenance-free sealed Lead-Acid Battery with suspended electrolyte : leakproof  Dimension (432 x 44 x 660 mm) WHD  Form Factor Rackmount 1U  Battery Maintenance-free sealed Lead-Acid Warranty 2-year  Limited Warranty by Authorized Distributor