1-To-8 PWM connectors 2200f capacitor provides stable voltage Support speed detection for accurately controlling fans Pwm 4pin header x 8, Compatible with 3pin Cable (speed control function is unavailable for 3 pin fans. Attached 3 pin fans will run at maximum RPM). Compact size at only 54mm (w) x 19mm (H) x 40mm (D). included 3M adhesive to APPLY anywhere within your case.