Features: This fan controller utilizes advanced technology for precise fan speed control, automatically adjusting based on systems temperature to deliver optimal cooling efficiency for computer cases. Featuring a single 4pin output, low power design, and a convenient knob for manual adjustment, it ensures quiet operate and easy installation with minimal power consumption. Ideal for PC enthusiasts, builders, and server administrators seeking reliability and efficient cooling solution for their setups. Perfect for everyday computing, high performances gaming rigs, and server environments where consistent fan management is important for device longevity. With broad compatibility across various computer cases and devices, this 4pin fan speed controller offer a plug and play experience for enhanced user convenience. Specifications: Component: PCB, metal Size:Approx.24x19mm/0.95x0.75inch Input voltages: DC12V Duty cycle adjustable: 0%~97% frequency: 25KHZ Option Type:Fan Speed Controller with Wire,Fan Speed Controller without Wire; Communication interfaces: 4pin interfaces Applicable scenario:PC,Workstations and servers; Package Includes: 1pc Fan Speed Controller note: Please allow 1-3cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.