The LC1200 1200W 120V Line Conditioner - Automatic Voltage Regulator adjusts under- and overvoltages to provide safe, computer-grade AC power that meets ANSI C84.1 specifications. The automatic voltage regulation (AVR) offers three levels of voltage stabilization that corrects undervoltages as low as 89V and overvoltages as high as 147V back to regulated 120V nominal power. Providing optimum voltage conditions not only extends the life of your equipment, but also keeps your equipment working through brownouts and prolonged overvoltage conditions.A network-grade 1200-joule surge suppression rating exceeds the IEEE-587 standard for surge suppression (both categories A and B) and prevents even the strongest spikes from inflicting damage, data loss or corruption and audio/video performance problems on your connected equipment. EMI/RFI noise filtering protects your AC line from disruptive electromagnetic and radio interference.Just connect the space-saving NEMA 5-15P right-angle plug with 7-foot cord to an AC power source, and plug up to four devices into the NEMA 5-15R outlets. You can monitor AC power, incoming voltage level and AC line status using the seven diagnostic LEDs on the front panel. The compact LC1200 fits comfortably into your computer or home theater setup.