Product Model:R42A 4.0 Product Name:M2 NVMe key-M to PCIe x4 adapter board Bandwidth speed:PCIe 4.0 x4 Applicable cards: High-speed network cards, capture cards, NVMe SSD hard drive cards, USB adapter cards, PCI-E x4 and other interfaces. Product Advantages: Use PCIe 4.0 high-quality connectors, PCB selection of high-frequency low-resistance quality materials, PCB workmanship precision, PCB using high plate, copper thickness thickened to 1oz; connector gold-plated conductive performance, can reduce the oxidation of rust impedance rise and cause disconnection speed reduction card slow lag and other problems. Differential signal to strengthen the layout design, there be no CAF micro-short circuit phenomenon high-speed signal data transmission does not exist parasitic capacitance and parasitic inductance signal attenuation interference problems, power supply circuit to strengthen the wiring design, PCB board miniaturization design, can reduce institutional interference, not card hardware, product installation is easy. The adapter board does not require a driver. Colour:black Material:PCB Tips: incorrect assembly or improper operation burn your equipment. Limited to professional engineers designated to buy. Does not support external graphics cards for laptops. Accessories Description: with SATA power adapter cable, you must connect the power cable to have 12V power supply. Due to different product batches, the appearance , which does not affect the use Package Contents: 1 * M2 NVMe key-M to PCIe x4 adapter board 1 * SATA Power Cord(Adapter cable color is random, don' accept the specified color) Only the above package content, other products are not included. Note: Light reflection 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.