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This 4-Pin PWM fan splitter cable upgrades a single motherboard fan port into three output ports, allowing you to connect multiple case and CPU cooling fans simultaneously. It maintains complete PWM signal control for smart speed regulation and effective heat dissipation. Made of high-quality durable wire and sturdy terminals, it ensures stable power and signal transmission for long-term daily use. Simple plug-and-play installation, perfect for PC building, chassis renovation and multi-fan cooling system upgrade.