4 pin 1 to 3 ways PWM fan splitter cable, to realize 3 fans powered by 1 interface with speed regulation High quality high density black sleeved cable, 24AWG, length is approx. 27cm / 10.5 inches The fan adapter has only one connector with a yellow RPM speed/tachometer line. Make the motherboard receive only one fan RPM speed reading without being confused by multiple fan readings The cable is compatible with 3-pin and 4-pin PC fans Can be used for a motherboard 4 pin interface powering for multiple cooling fans and PWM speed control, lengthen and extend the motherboard 4-pin interface