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This 4Pin PWM fan splitter cable features a 4-pin female input and three 4-pin male outputs, letting you expand a single fan header to power up to three PC cooling fans simultaneously. It supports PWM speed adjustment to keep your system cooling balanced and quiet. The premium sleeved outer cover enhances wear resistance and improves internal cable management. With 12 inches proper length, it is easy to route inside the case, suitable for desktop PC assembly, fan expansion and DIY cooling modification.