The thickened immersion gold PCB gold-plated version is more durable and stable than the tin-sprayed version, especially for high-speed signal transmission, which has better continuity and stability. Thick gold finger gold-plated gold finger is gold-plated, connected with the USB slot of the motherboard to the integrity of data transmission and stable operation. Adopt all-solid capacitors High-performance and high-quality electronic components solid-state capacitors are environmentally friendly, low impedance, and stable at high and low temperatures. High-strength anti-deformation baffle Motherboard fixing bracket adopts double-folding scheme, and the design is stable, firm, strong and durable. Five-speed design, free expansion, practical and convenient. Built-in interface: M-KEY+B-KEY dual interface Support slot: PCI-E 3.0 X4 GEN3 (X4 X8 X16 are available) Supported devices: PCI-E standard NVME disk and SATA standard M.2 NGFF disk Support system: iOS/Windows8/10/Linux Colour:black Material:PCB Size:13.8 x 5.7CM Package Contents: 1 * Expansion Card 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.