Best solution for poor power regions and applications requiring longer run times. APC Back-UPS RS 900VA can be placed on the floor, or on a shelf. Four battery backup outlets with automatic voltage regulation (AVR) enable you to work through even the most frequent brownouts and power sags. For printers and other devices that do not store or process information, three additional outlets provide surge protection. Both Ethernet 10/100BaseT and telephone dataline surge protection safeguards against surges entering via network connections. The PowerChute Personal Edition software features easy-to-use safe system shutdown with sophisticated power management.