USB connection Use your PC to access additional power protection and management features for your UPS via a USB Port. Telephone dataline surge protection Provides protection of connected equipment from power surges traveling on telephone lines. Automatic Voltage Regulation (AVR) Automatically steps up low voltage and steps down high voltage to levels that are suitable for your equipment. Resettable circuit breaker Easy recovery from overloads; no need to replace a fuse. Automatic restart of loads after UPS shutdown Automatically starts up the connected equipment upon the return of utility power. Automatic selftest Periodic battery selftest ensures early detection of a battery that needs to be replaced.