Features: Reduces the number of adapters and jumpers by directly connecting one wire to the interface, effectively minimizing interface interference and line loss, ensuring data reliability and improving work efficiency. Effectively solves the issue of insufficient PCI-E interfaces on the motherboard; one interface can be expanded to four. The USB connector is gold-plated to reduce interference between interfaces and improve data integrity. The main control board uses direct power supply from the PCI-E interface, eliminating the need for an external power cable. This design ensures the main control power is not affected by external interference, providing higher stability. Specifications: Item: PCI-E 1X 1 to 4 Expansion Card Number of interfaces: PCI-E X1, USB 3.0 x 4 Product Size: approximately 120 x 66 x 56 mm / 4.72 x 2.6 x 2.2 in Supported Systems: Windows XP, Windows 7, Windows 8, Windows 8.1, Windows 10 Bus Interface: PCI-E X1 (compatible with X4, X8, X16 graphics slots) Gross Weight: 100g Operating Environment: 0C to 70C Note: Does not support USB devices. Slight size variations may occur due to manual measurement and different measuring methods or tools. The image may not reflect the actual color of the item due to variations in lighting, shooting angle, and display monitor settings. Package Includes: 1 x PCI-E 1X 1 to 4 Expansion Card