The ARD Nano V4 is a very small micro controller and developed through the pin bar directed downwards, especially for working with boards. The integrated USB Type-C interface can supply the circuit and board with power and also transfer programs to the microcontroller. The NanoV4 is fully compatible with the Arduino Nano V3. It is particularly important to note that only original chips can be used. https://elecena.pl/product/28015983/joy-it-micro-controller-ard-nano-v4-board-compatible-with-arduino-nano-v3 2025-03-12 https://elecena.pl/product/28015983/joy-it-micro-controller-ard-nano-v4-board-compatible-with-arduino-nano-v3 2025-05-22 https://elecena.pl/product/28015983/joy-it-micro-controller-ard-nano-v4-board-compatible-with-arduino-nano-v3 2025-09-17 https://elecena.pl/product/28015983/joy-it-micro-controller-ard-nano-v4-board-compatible-with-arduino-nano-v3 2026-05-03