1. GOLD PLATING PROCESS: The PCIE expansion card uses a PCB circuit board with a gold plating process for enhanced conductivity, wear resistance, oxidation resistance, and a high fire rating. 2. COMPATIBLE SPECIFICATIONS: Simultaneously expands 4 slots on both sides, compatible with 2242/2260/2280/22110 specifications. 3. SUPPORTED FUNCTIONS: The PCIE expansion card supports M.2 M KEY NVME protocol SSD and Optane, as well as M.2 PCIE protocol expansion cards and equipment. 4. STABLE TRANSFER: Dual-sided heat dissipation ensures more stable transfer, with two adjustable speeds. 5. LED INDICATOR: The card features a soft LED indicator. The green light illuminates when the card is connected and powered on, and it flashes during read/write operations. 6. USE WITH CONFIDENCE: The read speed in PCI E4.0 mode can reach 14000+Mb/S. Note: The card can run 4 NVMEs simultaneously, but the motherboard must support PCIE signal splitting. 7. CONVENIENT AND PRACTICAL: Supports 4 X4 full channel, full speed NVME SSD and M.2 PCIE interface devices. The motherboard must support PCIE splitting or PCIE function.