APC SRT Lithium Ion 1000VA RM 230V Smart-UPS (SRTL1000RMXLI) - Max Configurable Power (Watts): 900 Watts / 1.0kVA, 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: Built-in bypass, Interface Port(s): RJ-45 Serial, Smart-Slot, USB, Expected Battery Life: 5 - 10 years