Efficient Bootloader Burning Features an onboard buzzer and LED indicators for successful bootloader burning, improving the efficiency of Arduino board modifications. Robust Power Supply Operates at a stable 5V 500mA supply voltage, ensuring reliable performance and compatibility with international standards. Versatile Compatibility Compatible with Arduino UNO R3/Mega2560/Nano/Pro mini, this shield board offers wide application for various Arduino boards. High-Quality Construction Constructed from high-quality materials, this shield board ensures durability and longevity in frequently used scenarios. User-Friendly Design Equipped with an intuitive interface and clear indicators, this shield board simplifies the bootloader burning process for users. Advanced Programming Features Includes FT232RL and CH340G interfaces for USB to TTL programming, making it easy to upload code to external chips.