Features: This adapter card enables seamless compatibility between B key 3042/3052 networking modules and M key 2280 motherboard slots, offering flexible connectivity for PCIe/USB based modules with included conversion cable. Featuring an 80mm PCB design and 94V0 flame retardant certification, it delivers performances across extreme temperatures ( 40°C to 80°C) while maintaining portability at 4.3g. Ideal for PC builders, networking engineers, and enthusiasts upgrading industrial systems or customs rigs requiring module integration with M key motherboards. Perfect for expanding wireless connectivity in IoTs devices, embedded computing solution, or home server setups needing 3.3V networking adapter conversions. Engineered with precise PCIe protocols support and B key/M key alignment, this adapter ensures stable data transmission for modules while preventing voltages mismatch risks in motherboard installations. Specifications: Materials:PCB Size: 80x20x4.55mm : 4.3g Temperature: -40°C to 80°C voltages: 3.3V Package Includes: 1PC B & M Key to B Key Module Adapter Card note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.