Improves Picture and Sound Quality, Monitors Incoming Line Voltage, and Reduces Cross-Contamination Between Components. Improves Picture and Sound Quality Level 4 Power Cleaning and Filtration eliminates common symptoms of contaminated power (including loss of detail, pops, hisses, hums and visual artifacts) and allows your A/V equipment to perform up to its full capability. Monitors Incoming Line Voltage and Provides a Visual Indication of Power Level Panamax patent pending AVM circuitry continuously monitors the incoming power as displayed on the digital voltmeter. In case of an undervoltage or an overvoltage, a flashing red lightning bolt will be displayed in the voltmeter, and power to the connected equipment is automatically turned off if either of these conditions is detected. When voltage returns to a safe level, power to the equipment is automatically reconnected. Reduces Cross-Contamination Between Components The M5300-PM is designed to provide noise isolation between 5 isolated outlet banks (including 1 bank with 2 high current outlets) so that any noise created by an A/V component cannot contaminate the power going to equipment plugged into another outlet bank.