5Pcs DIY PCB Expansion Board Kit Compatible UNO R3Feature: Compatible pin, completely separate pad, easy to build your own circuitDual IO interface, you can solder sockets, multilayer expansionDouble sided PCBIO have a patch pad on the back, easy connectionHeightening special pin design, to prevent short circuit with USB interfaceSpecification: Model: Shield R2Size: 68 x 56mmColour: BlackMaterial: Fiberglass substrate, goldPackage includes: 5 x DIY PCB Expansion Board,,
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5Pcs DIY PCB Expansion Board Kit Compatible UNO R3