Models: 1) 500VA 2) 700VA 3) 1000VA 4) 1200VA 5) 1600VA 6) 2000VA Features: 1) LCD display 2) CPU control 3) AVR function 4) Auto frequency detect 5) Large loading capacity and compatibility 6) Intelligent UPS management software (optional) 7) Cold-start function 8) Wide input voltage range 9) Overload and output short circuit protection 10) Over-discharge function 11) Built-in power purifying circuit minimizes distortion caused by pulse and miscellaneous waves 12) Buzzer alarm function 13) Fax / modem / telephone protection port 14) Complete battery management design Primary technical parameters: 1) Rated voltage: AC 110V / 220V 2) Rated frequency: 50 / 60Hz 3) Input range: AC85-135V/165 - 275V 4) Output: AC 110±10%/220V±10% 5) Transfer time: 4ms 6) Battery type: a) 1 x 12V / 7Ah (500 / 700) b) 2 x 12V / 7Ah (1, 000 / 1, 200) c) 3 x 12V / 7Ah (1, 600) d) 4 x 12V / 7Ah (2, 000) 7) Back-up time: over 15mins 8) Charge time: ≤8 hours 9) Operating temperature: -5 - 40°C 10) Operating humidity: 10 - 90% relative humidity, non-condensing 11) Audio noise: < 40dBA