Welcome to the store! Feature: This Y-splitter cable allows you to connect 2 PWM fans to one PWM port for optimal performance and hassle-free cooling. Since only one of the two connectors on the PH-CB-Y4P carries the speed control signal, there will be no conflict when using two PWM fans. 4-Pin PWM Y Splitter cable for fans. The Y-splitter allows you to connect 2 fans to one fan header. The Y-splitter can also be used with other 3-pin (PH-CB-Y3P) or 4-pin (PH-CB-Y4P) fans as well, maximizing the number of fans you can have in your build. Only 4-Pin Splitter Fan Cable, other accessories demo in the picture is not included Specifications: Item Type: Adapter Cable Material: ABS Size: 110mm/4.3in Color: Black Connector: 1x4Pin (Male Connector/Female Pin) to 2x4 pin(Female Connector/Male Pin, Master 4pin/Slave 3pin) Quantity: 1 Pc Tips: To adjust the fan speed, the two fans can only maintain the same speed. In order to prevent reading the different speed information of the two fans, the adapter is designed as one 4Pin and one 3Pin, so that it can not only read a complete fan speed information, but also adjust the speed of the two fans. Note: No retail package. Transition: 1cm=10mm=0.39inch Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes: 1 x 4 Pin Splitter Fan Cable Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will give you the best solution!