APC SRT 6000VA 230V Smart-UPS (SRT6KXLI) - Max Configurable Power (Watts): 6.0kWatts / 6.0kVA, Input frequency: 40 - 70 Hz Auto-sensing, Output Frequency (sync to mains): 50/60 Hz +/- 3 Hz Sync to mains, Load Crest Factor: 3 : 1, Bypass: Internal bypass (automatic and manual), Interface Port(s): RJ-45 10/100 Base-T, RJ-45 Serial, Smart-Slot, USB, Expected Battery Life: 3 - 5 years