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This 4Pin PWM fan splitter cable features a 4-pin female input and three 4-pin male outputs, enabling easy multi-fan expansion for desktop chassis. It supports synchronous PWM speed adjustment to balance cooling performance and noise. Fine black sleeved outer casing improves abrasion resistance and enhances internal aesthetics. Moderate 27cm length offers flexible installation and tidy wiring layout. Plug and play, perfectly suitable for PC assembly, fan upgrade and daily cooling system DIY modification.