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This 60cm black sleeved adapter cable features a built-in 12V step-up circuit, turning regular USB power into steady 12V voltage to drive PC cooling fans. It supports dual 3-Pin and 4-Pin fans running at full speed, providing reliable high-airflow heat dissipation. The premium sleeved cable improves tensile strength and keeps internal wiring tidy. No driver needed, just plug and play, perfect for chassis cooling, DIY fan setup, cabinet ventilation and desktop auxiliary heat dissipation.