The PRO1200SFC is a single-phase input/ single-phase output Line-Interactive UPS system with PROLiNK's latest Super-Fast Charging Technology. Key Features & Benefits Super Fast Charging-: Built-in super fast charger, battery can be recharged to 90% of its capacity within 2-4 hours. TRUE 3-Step AVR-: Automatically regulating and smoothing the power supply from voltage fluctuations to better prevent under-voltage brownouts and over-voltage power surges. Universal Socket-: Able to support a wide range of equipment. Wide Input Voltage