Features: brand new and high quality Through the step-down line, the fan's starting voltage is reduced, which reduces the fan's speed and achieves the effect of silence; Has 3 Pin Male to Female Connector. Easy installation. Long lifespan. Designed with a resistor on the cable. Quite practical and useful. Use the 3-pin cable to connect the power supply to your cooling fan, it will reduce the fan's speed and dramatically reduce the noise level. As a general rule, the faster the fan spins, the more the speed reduction. There is no standard value for the deceleration rate. The marked deceleration value is an approximate range for reference. Specifications: Scope of application: 3-pin interface fan Connector Type: 3 Pin Male to Female Optional Resistance: 27Ω (white）/37Ω（Blue）/ 47Ω（Red） Main Material: PVC Main Color: White/Blue/Red Total Length: approx. 12cm / 4.72in Weight: 30g Note: Resistance heating during use is a normal phenomenon There may be a slight error in size for manual measurement. Color deviation may differ due to different monitor settings, please understand. Package includes: 5 pcs x Fan Resistor Cables