High Frequency and True Double-Conversion. DSP (Digital Signal Processors) Technology. Input Power Factor Correction (PFC). Wide Input Voltage Range (110~300V). Output Power Factor 0.9. Cold Start. Auto Sensing Frequency. ECO Mode Operation for Energy Saving. Selectable Output Voltage via LCD. Output Bypass Settable via LCD. Power-On Self Test. Advanced Battery Management (ABM). Short Circuit and Overload Protection. Automatic Charging in Off Mode. Auto Control Fan Speed when Loads Varies. Standard RS232 Communication Port And RJ45 Protection. USB Port. Emergency Power Off (EPO). Extension Battery Bank (Optional). Built-In Isolation Transformer (Optional). SNMP Communication Port (Optional).