Line Interactive UPS topology includes technology that enables the UPS to interact with incoming AC voltage and correct minor voltage fluctuations without switching to battery.  This extends the life of the battery and is essential in areas where frequent power fluctuations are common.  The MercuryUPS 1550VA Maverick Line Interactive UPS  ideal for Personal Computers and Electrical Equipment.  Protects from damage, downtime, and data loss.Features of the 1550VA MAVERICK UPS:Power-on self-testSinewave SinewaveHumanized Alarm SystemOff mode charging functionOptional no-load shutdownBuilt-in self-diagnostic functionIntelligent battery managementExcellent microprocessor controlAuto restart while AC is recoveringComprehensive and reliable protectionBoost and buck AVR for voltage stabilizationBuilt-in super-fast charger shorten charging timeModel:–  Capacity: 1550VA/930W  Input :–  Voltage 220-230VAC– Voltage Range 140-300 VAC–  Frequency: 50 / 60Hz–  Current:7.2A MaxOutput:–  Voltage Regulation (Bat.Mode): +/-10%–  Frequency :50 / 60Hz– Waveform: Simulated Sine waveBattery:–  Battery Type: 12V / 8.2AH x2–  Charging ability: 6 hours recover to 90% capacity Transfer Time:–  Typical:2-6msProtection: Short circuit, Overload, Battery discharge and overcharge, Surge ProtectionIndications:– Line Mode: Greenlighting–  Battery Mode : Yellow flashing– Fault: Red Lighting Audible Alarm:–  Battery Mode: Sounding every 10 sec–  Battery low: Sounding every 1 sec– Overload: Sounding every 0.5 sec– Fault: Continuous soundingEnvironment:– Humidity 0-90% relative Humidity 0-40°C (Non-condensing)–  Noise Level : Less than 40dB– Dimension:  313 x129 x175