Undoubted that its compact size and lightweight body ensure the product features with portable. It features with high accuracy and excellent performance, the speed can be adjusted at will. It is the speed controller that can improve the operating speed when the computer is working, thus the temperature of the internal components can be reduced. It is constructed of PCB board material. This governor adopts new materials, with low loss and low heat generation. The length of this product is 8cm, the width is 4cm and the height is 1cm. The multichannel interface makes it possible to connect multiple fans, and the motherboard can be used with 3pin or 4pin. The power supply interface has a power supply 4P interface and a SATA interface for easy selection. The measured output power is 6A=72W, and the single interface is about 0.6A. The governor can completely shut down the fan, freely adjust the voltage, and control the fan speed. The maximum voltage can be adjusted to about 11V, and the 12v voltage fan is full speed. Item Name: Speed Controller Material: PCB Board Color: Black Features: Easy Installation, Universal, Efficient Size Details: L: 8cm/3.15" (Approx.) W: 4cm/1.57" (Approx.) H: 1cm/0.39" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Speed Controller