Use this device to directly connect the USB2.0 9PIN interface on the board to two 9PIN interfaces. The USB shielded cable can effectively remove, suppress, or isolate interference, improving the stability and reliability of USB signal transmission. Prevention of interference: The design of USB with shielded cable can filter out electromagnetic radiation or interference in the signal, making the digital signal transmitted between USB devices more stable and reliable. Protection device: The filtering effect of USB with shielded wires can also effectively protect USB devices, avoiding interference from external electromagnetic waves that may damage or cause device failure. Improving transmission speed: USB with shielded cable can also improve the transmission speed of USB devices, as it can remove noise signals generated by electromagnetic waves and ensure a more stable data transmission rate. In summary, USB devices with shielded cable have many beneficial effects. For users who have high requirements for USB transmission speed and stability, using USB devices with shielded cable can better meet their needs. Main board USB 9-pin expansion cable 1 in 2 Length: about 15cm Colour:black Material:Plastic+copper wire+woven mesh Package Contents: 4 x Computer Motherboard USB Extension Cable