Features this UPS is suitable for the following disturbances Blackout Interruptions of Electric Energy for a Time Longer Than 10 ms Dynamic undervoltage Lowering of Voltage for a Period of Less Than 16 Ms Dynamic Overvoltage The Voltage Boost for a Time Below 16 ms undervoltage Lowering the Voltage for a time greater than 16 ms overvoltage Raising the voltage for a time greater than 16 ms line interactive (VI) The line interactive, technology is identified with the initials: VI (Voltage Independent). This Means That While Operating in Mains the UPS (UninterUtible Power Supply) Output Frequency is depending on the input frequency where the voltage is Handled by the us (Uninterruptibled Power Supper). It is in fact through the stabilizer circuit that these ups (uninterruptible power supply) are able to protect the connected equipment from persistent voltage disturbances just as overvoltage, and Blackout. Specifications Power Output VA (Computer Power): 2100 VA Power Output watt: 1320 W input Voltage: 220/230/240VAC Voltage Range: 160 ~ 290Vac Output Voltage regulation: +/- 10% Outputs protected from Black Out (IEC 320 C13): 4 + 2 filtered outputs (Red Color) Battery Type: 12V DC x 2 Charging Time: 4 ~ 6 Hours to 90% Connectivity USB: Yes RJ11/45 (in out): Yes Software: Yes for Windows / Mac Dimension and Weight Product size o (l x w x h): 315 x 148 x 198 mm Weight: 10.5 kg Packaging Size (L x W X H): 411 x 229 x 302 mm Gross Weight: 11.5 kg Environment Environment humidity: 0-90 % Rh @ 0-40 c (without condensing) Noise Level: & lt; 40db