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) Contact to me,skype:netcca-kayvi Em:kayvi-tan at qq dot com netcca001 at 163 dot com