features a patented microprocessor controlled comparator circuit,
which isolates power immediately it detects voltage outside
a pre-set safe window (190VAC - 265VAC) and automatically restores
power once power has returned within these safe levels. Uniquely
the PowerGuard is not earth or amperage dependent making it
ideal protection against Ground Surge from Lightning in lightning
PowerGuard is recommended for protection of all appliances
and equipment that are powered from AC mains power, reducing
the risk of damage from Under Voltage (Power Sags), Surges,
Over Voltage and Slow Average Fluctuations or Brown Outs.
PowerGuard also features a timer controlled delay circuit
to ensure that power remains isolated for a minimum of three
seconds, reducing the risk of Hard Drive Lockup in computers
due to rapid "Off and On" switching of power.