Automatic Voltage Regulation (AVR) automatically increases low voltage step by step and reduces high voltage to levels suitable for your devices. Surge protection devices safeguard connected equipment from surges on data lines. PowerChute Personal Edition supports numerous operating systems and processors. The USB connection allows access to additional management features of your UPS via a USB port. Warning tones notify users when the status of the power supply or UPS system changes. The LED status indicator provides a quick overview of the system and power supply status. Intelligent battery management optimizes performance, lifespan, and reliability of batteries through an intelligent precision charging system. Automatic self-test conducts periodic battery self-tests for timely replacement.