The ROLINE ProSecure Series - for optimum power protection is a truly state of the art online double conversion UPS, ideal for all essential computer systems and servers. Protects against: power failure, power sag, power surge, under voltage, over voltage, switch transient, line noise, frequency variation, harmonic distortion.- Cold start function (DC power on)- Lightning and surge protection- Battery replacement warning- Emergency Power Off function- Battery remain time display- LCD display front panel- Power factor correction- Support USB communication- Multiple language LCD display- On line output voltage selected- Hot swappable battery by user- True on-line technology provides all power protection- Pure sine-wave output with less than 3% THD- Fully digitized microprocessor controlled- Short Circuit and overload protection- Advanced