- Compatible with Raspberry Pi models: 3A+, B+, 2B, 3B, 3B+, 4B, Pi Zero, and Pi Zero W, as well as Arduino UNO R3, MEGA 2560, STM32, ESP32, and ESP8266. - Enables your Raspberry Pi to control high voltage and high current devices, transforming standard home appliances into intelligent ones. Access can be achieved programmatically or directly through the shell. - Stackable design allows for up to 4 layers of relay modules, increasing the number of control channels available. - Features high-quality relay modules integrated with leading microcontroller technology for seamless communication with your Raspberry Pi. Use Cases: - Automate home lighting systems, allowing you to control lights remotely or on a schedule. - Manage HVAC systems by controlling fans and heaters, improving energy efficiency and convenience. - Create smart garden systems that can control watering schedules based on weather conditions. This relay board is an essential tool for hobbyists and developers looking to enhance their projects with reliable control over high-power devices. Its robust compatibility and stacking capability make it a versatile addition to any maker's toolkit.