Hoembpn PWM Fan Speed Controller DC 12V 4 Wire Governor Regulator with Knob Switch and LED Indicator, 25kHz Frequency, Compatible PC Case/CPU Cooling

Precise adaptation to DC12V 4-wire PWM fans: Designed with 25KHz standard PWM frequency, it is compatible with most 4-wire 12V adjustable speed fans on the market, suitable for PC cases, CPU cooling and other scenarios. Precise speed regulation: The knob potentiometer speed regulation supports 0%-97% duty cycle adjustment, freely controls the fan speed, realizes the balance between noise and heat dissipation, and the fan runs stably without lag. Rotary switch LED indicator: The knob has a switch function, one-button start-stop and speed adjustment. The red LED indicator light is solid to indicate that the power supply is normal, and the operation is simple and intuitive. Compact design for DIY: Compact size and easy to install in small spaces, suitable for DIY modifications. Note: Manually soldering the cable to connect to the 12V power supply. Practical 2-pack: The package includes 2 speed controllers, which can be used by multiple fans at the same time or as spare parts, suitable for DIY installation, cooling solution optimization, and suitable for PC enthusiasts and maintenance personnel.