This sleeved fan power splitter takes power straight from the power supplys 15Pin SATA connector and supplies power to two case cooling fans simultaneously. It works for both traditional 3-pin fans and 4-pin PWM speed-adjustable fans, perfectly resolving motherboard fan port shortages. The integrated mesh sleeve protects wires and streamlines cable management inside the PC case, ideal for high-airflow gaming builds, workstation assembly and multi-fan cooling system upgrades.