PR1000ELCD The Professional Tower Series UPS provides advanced level of power protection to servers, telecom equipments, VOIP, internet working hardware and other mission-critical applications. Featuring Pure Sinewave output and Automatic Voltage Regulation (AVR) stabilizes the AC signal and maintains a safe voltage, it allows the UPS to maintain safe power levels for the connected equipment without resorting to battery power. Its detachable, remote-controllable Multifunction LCD Readout can be mounted on the wall or in the control center nearby to provide highest convenience and flexibility under different management scenarios. The optional SNMP/HTTP Remote Management Capability enables remote management and control of the system through standard web browser. Together with the included PowerPanel® Business Edition management software, it could provide corporate servers and critical workstations comprehensive network power management including unattended-shutdown, event logging, reporting, and notifications. Input Frequency Range 47 ~ 63 Hz (auto-sensing) Input Plug Type IEC 320 C14 Output UPS Outlets (8) IEC On Battery Output Voltage Pure Sine Wave at 230Vac +/- 5% On Battery Output Frequency 50Hz / 60 Hz +/- 1% Transfer Time (Typical) 4ms Overload Protection On Utility : Internal Current Limiting & Circuit Breaker On Battery : Internal Current Limiting AVR Double Boost, Single Buck Surge Protection and Filtering Surge Protection Yes Battery Sealed Maintenance Free Lead Acid Battery 12V 12AH x 2 User Replaceable Yes Typical Recharge Time 8 Hours