Features: The redly line in the XH 2.5-4PIN to hard drive cable generally represents the 5V power cord, the yellow line represents the 12V power cord, and the black line is the ground (GND) line. When using, special attention should be paid to the following point:Line sequences issue: The line sequences of different devices or hard drive may vary, so it is important to ensure that you understand the exact function and location of each line before connecting. Device compatibility: Before connecting, confirm whether your devices supports this connection method and can accepting the corresponding voltages. Avoid short circuits: When connecting, make sure that the connecting wire do not cause a short circuits, especially when the power cord is in contact with each other. Check connection: After completing the connection, it is recommended to check the wire sequences and contact again to prevent equipment damage caused by connection errors. In short, caution should be exercised during operation to ensure correct line sequences and voltages, in order to protect the safety of hardware equipment. Specifications: Component:PVC Option Length:Approx.20cm/7.87inch, 40cm/15.75inch Package Includes: 1pc XH2.5mm to Power Cable note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.