The DC Laptop Power Adapter adjusts the output voltage to the correct operating voltage and amperage requirement for this series of laptops. Adapters are housed in rugged Aluminum cases & epoxy encapsulated to resist shock and moisture. - Output Short Circuit Shut Down. - Output Current Limit. - Input Noise Filter. - Internal Overtemperature Shut Down. - Low Input Voltage Shut Down. - High Input Voltage Shutdown. - Automatic Shut Down Reset.