Connectors: 1 x 4 Pin (Female) to 1 x 4 Pin (Male), 1 x 3 Pin (Male) Length : 13cm.PWM FAN SPLITTER Y-CABLE connects 2 computer case fans to a single motherboard fan header; 1 to 2 fan converter cable connects an additional fan to increase airflow in your computer case. Length : 13cm.PWM FAN SPLITTER Y-CABLE connects 2 computer case fans to a single motherboard fan header; 1 to 2 fan converter cable connects an additional fan to increase airflow in your computer case. 4-Pin receptacle connects to the 4-Pin header on the motherboard and splits the signal to 2 PWM fans; Fans can spin at the same speed using software from a motherboard equipped with PWM control. 3-PIN & 4-PIN FAN COMPATIBLE with popular brands of computer case CPU cooling fans.