Features: This 4 port PWM fan hubs enables precise speed synchronization for multiple servers fan, optimizing airflows control and heat dissipation efficiency in high demands. with plastic, the splitter supports PWM signal sharing across four fan, ensuring stable adjustments and broad compatibility with servers/PC cooling systems. for IT professional, data center technicians, and DIY enthusiasts centralized thermals management for multiple fan setups. for servers racks, overclockeds workstations, or NAS upgrades where sustaineds heavy workloads require temperature regulation. As servers fan speed controller and 4 way fan splitter, it simplifies cable clutter while maintaining consistent PWM signal accuracy for enhanceds systems longevitys. Specifications: Materials: Plastic Size: 8x5cm/3.15x1.97inch Package Includes: 1PC PWM Fan Speed Controller note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.