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Evaluation Boards for Arduino Uno R4 Development Board with WiFi. CE and RoHS Certified: Products meet CE and RoHS certification standards for quality and safety. 6 Years Manufacturing Experience: Manufacturer with 6 years of experience and a workshop in Shenzhen. Low MOQ for Trials: Standard MOQ is 100 pcs, but lower quantities are accepted for trial orders. Fast Sample Lead Time: Existing samples are ready within 3-5 days for quick evaluation.