This 4 port pwms fan hubs enables speed synchronization for multiple servers fan, optimizing airflows control and heat dissipation efficiency in high demands As servers fan speed controller and 4 way fan splitter, it simplifies cable clutter while maintaining consistent pwms signals accuracy for enhanceds systems longevitys for servers racks, overclockeds workstations, or NAS upgrades where sustaineds heavy workloads require temperature regulation for IT professional, data center technicians, and enthusiasts centralized thermals management for multiple fan setups with, the splitter supports pwms signals sharing across four fan, ensuring stable adjustments and broad compatibility with servers / cooling systems