Description: 【Material】: This PWM Speed Controller is Made Pla material, with premium workmanship, can be reused and has a long service life. 【Small and Portable】: Our 4Pin PWM Speed Controller is small and portable, does not take up too much space, is easy to carry, and easy to install and use. 【Widely applicable】: This Fan Speed Regulation is widely applicable to water cooling fans, chassis fans and other types of fans. 【Features】: Fan Controller is both practical and beautiful, supports 4 wire fans, and uses TYPE C USB power supply, which is convenient and fast. 【Knob type adjustment】: 4Pin PWM Speed Controller adopts knob type adjustment, and you can connect the fan according to your own needs. Size Chart: 4.5cmx2.3cmx1.8cm/1.77inchx0.91inchx0.71inch Package Includes: 1 PWM Speed Controller Note: Please allow slightly errors 1-2cm differences due to manual measurement.