Sine Wave Output Input Power Factor Correction DC Start-up Bypass Protection No One Around Function Frequency Conversion Startup Function Long Endurance Design Self-Check Function Stable to Disturbance Possible to Collocate with Power Generator Able to Connect with Inductive Load Build-in High Quality Valve-Control Lead-Acid Storage Cell Microprocessor controlled Line Interactive Technology Boost and buck automatic voltage regulation (AVR) Advanced battery management (ABM) Short circuit and overload protection Lightning and surge protection Fault status LEDs Cold start & energy saving features Communication port and remote monitoring software Telephone / modem internet surge protection Input Voltage: 230V or 220V+-25 Output Voltage: simulated sinewave 220V+-10 Frequency: 50 or 60 Hz+-1 Communication: RS232 port Back up time: 5 - 30 minutes (depending on computer load) we cooperate with APC,santak,sendon,emerson,kstar. also supply the OEM.