Thermalright PWM Fan Hub Controller TL-Fan HUB X4, 3Pin/4Pin Ports 814256016728Size: 67 x 24 x 12mm. PWM Funtion: Support the red interface fan speed reading and PWM adjustment. Easy to Install: This hub included double-sided adhesive. Stable Output: 4 pin direct output, compact size and stable function. Sufficient length: Configure 50cm wiring. $7.99Newegg.comDelivery: to Redlands ReportBuy!