1. 1 points 4 ports, one time solves the embarrassment that the motherboard fan port is not plugged enough 2. Expand the 3-pin/4-pin interface of the 4-bit fan, solve the lack of motherboard interface, and concentrate on processing fan wires. 3. The pwm interface is connected to the motherboard cpu fan interface, the first dedicated interface for cpu fan. 4. FAN1/FAN2/FAN3 interfaces are pwm conventional fan interfaces. 5. The extension cable provides more flexibility between the motherboard and the processor cooling fan. [Product name]: computer fan hub [Cable length]: 40cm wrapped nylon mesh (other sizes can be customized) [Extended Quantity]: 4 [Wire model]: 1007 22AWG [Conductor specifications]: 17 x 0.12TS [Outer diameter of wire]: OD1.4mm x 4 [Rated temperature]: 80Celsius [Product weight]: 17 grams [Product Interface]: Computer motherboard 4Pin interface colour:Black Material:Tinned copper size:5 x 1.8cm Package Contents: 1 x One for four Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.