This high performance desktop battery backup offers maximum protection for computers. The fully featured APC RS features up to 4 battery backup outlets with automatic voltage regulation (AVR), enabling you to work through even the most frequent brownouts and power sags, keeping 75 minutes of battery power for when you need it most. For printers and other devices that do not store or process information, up to three additional outlets provide surge protection. Telephone dataline surge protection safeguards against surges entering via Telephone, ISDN or ADSL connections. The PowerChute Personal Edition software features easy-to-use safe system shutdown with sophisticated power management.