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Regulated Dual Power Supply SK-304 Dual power supply can output both regulated 5 Vdc and 1.5 to 10 Vdc for electronic projects. The fixed 5 volt supply is great for digital projects. The variable supply can adjust for almost any analog project. A great supply for the SK-100 and 200 series of kits that lets you Save money on batteries. A must for every electronics bench! Fixed Output Voltage Load regulation