- Compatible with Raspberry Pi models 3A+/B+/2B/3B/3B+/4B, Pi Zero, Pi Zero W, Arduino UNO R3, MEGA 2560, STM32, ESP32, and ESP8266. - Transform your Raspberry Pi board into a powerful tool for controlling high voltage and high current devices, allowing standard home appliances to be automated and made intelligent. - Features up to 4 stackable layers, enabling expansion for more channels. The 4 Channel Relay utilizes high-quality relay modules integrated with popular microcontroller technology for seamless communication with the Raspberry Pi. - Easily program the relay board or control it through a command shell for straightforward operation. - Use cases include automating lighting systems, controlling home heating or cooling devices, and managing industrial equipment remotely. - This reliable relay board is designed for easy integration and enhances the functionality of your projects by adding multiple channels with additional relay modules.