1) Three phases in, one phase out2) True on-line double conversion design providing all power protection3) Sine wave pulse width modulation4) Smart RS-232 communication port5) Optional SNMP card6) Wide Input voltage windows7) Pure sine wave output less than 3% THD8) Expandable battery run time9) Generator compatible10) Cold start11) Load / battery power meter display12) Overload, on-line, battery status LED/LCD