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Prototype Shield suitable for Arduino UNO R3 Gold plated finish prevents oxidation, High quality Gold finish for easy soldering. All holes are through-plated for strength It contains two 5V and GND buses, reset button and universal button, 5mm red LED reset indicator light, and welding circuit can be set up freely. The PCB board retains the original 0.1 inch bar and expands the screw terminals with 3.5mm pitch pins Size: 81.2mm*68.5mm*13mm Excellent service: If you have any suggestions or questions about our products, please feel free to contact us. We will deal with you within 24 hours and give you a perfect answer.