The LR1000 1000W 230V Power Conditioner adjusts under-voltages and over-voltages to provide safe, computer-grade AC power. Built-in automatic voltage regulation (AVR) offers three levels of voltage stabilization that correct under-voltages as low as 168V and over-voltages as high as 278V back to regulated 230V nominal power. Providing optimum voltage conditions not only extends the life of your equipment, but also keeps your equipment working through brownouts and prolonged over-voltage conditions.