4 Pin 12V PWM PC Fan Speed HUB for 4pcs Fans | 2 Independent Speed Controller Knobs, 12V SATA DC 5521 Powered, Max 100W, with PCI Slot Bracket for Desktop PC/NAS/Server

dual independent control
& 4-port expansion: 2 separate control knobs, each regulating 2 x 4-pin PWM fans, delivering precise, independent speed tuning for different fan groups. Exclusively compatible with standard 12V 4-pin PC cooling fans (NOT compatible with 2-pin or 3-pin fans). The hub comes with 4 on-board 4-pin fan headers, and you can easily connect additional fan splitters to expand to more fans, effortlessly boost your system's cooling capacity.
Dual power supply options: Supports both SATA power and DC 12V input, with a maximum output of 12V 100W. Use only one power source at a time, do not connect both simultaneously. Works with desktops, NAS, servers, and other devices without extra motherboard fan headers.
Precise PWM Speed Regulation: Advanced PWM technology delivers accurate, noise-free speed control, extending fan lifespan and ensuring stable performance. Fully hardware-controlled, no drivers or software needed, plug-and-play for 24/7 operation.
PCI Slot Internal Installation: Comes with a full-height PCI bracket for seamless installation inside your PC case, saving external space and keeping your setup tidy.
Package Include: a PCS Fan Speed Controller