Product Description Brand: Prolink(PRO920H Online UPS) True Double-Conversion Online UPS Rack or Tower design Wide input voltage range (110~300VAC) Input Power Factor correction 0.99 Output Power Factor 0.90 50/60Hz frequency converter mode Hot-Swappable battery design Programmable power management outlets Emergency Power Off (EPO) function ECO Mode Operation for energy saving General Compatible Charger capacity expansion to 8A for long-run models SNMP+USB+RS232 multiple communications Smart battery charger design for optimized battery performance Selectable output voltage via LCD panel Accessories: External maintenance bypass switch * SNMP card