12V Step-Up USB Fan Power Adapter Cable,1 to 2,1 to 3 Black Sleeved - Full Fan Speed Adapter for 3-Pin/4-Pin PC Cooling Fans

12V Step-Up USB Fan Power Adapter Cable,1 to 2,1 to 3 Black Sleeved - Full Fan Speed Adapter for 3-Pin/4-Pin PC Cooling Fans

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