A variable voltage, universal, AC to DC power supplies with selectable DC voltage from 3 to 12 V DC. This unit plugs into a standard US 110/120V AC receptacle and provides manual speed control for all of the Cool Components products. Speed is adjusted by varying the voltage and the normal operating range of the cooling and ventilation products, 7 to 9V for most applications or 12V for more demanding and aggressive situations. Operation between 7-9V provides quieter fans, while at 12V will be more audible. The advantage to this feature is that it provides the option to run the cooling products quietly when components are within close proximity of sitting areas or more aggressively when components are tucked away in cabinetry and closets. This is when components require more airflow and when noise is not as big of a factor.