1) Input frequency: 50HZ+/-5 2) Input voltage range: 165V-270V 3) Output voltage: 220VAC+/-15% (DC mode) 4) Wave form: PWN on DC mode, sine wave on AC mode 5) Warning when AC fail and low battery 6) AC/DC overload and low battery protection 7) Battery: 1pc x 12V7. 5AH 8) Typical Backup Time: 3-20 minutes (1 PC) 9) Charging Period: 10 hours reaches 90% 10) Software: NO 11) Dimensions: 311 x 96 x 136cm 12) Net weight: 6. 5kgs