GeeekPi 4 Channel Relay Board Module for Raspberry Pi, Power Relay Module for Raspberry Pi 4B/3B/3/2B ,No Programming Required/Programmable

Compatible with Raspberry Pi 3A+/B+/2B/3B/3B+/4B/Pi Zero/Pi Zero W, Arduino UNO R3 / MEGA 2560 / STM32/ESP32/ESP8266, The Relay Board gives your Pi board the ability to control high voltage/high current devices, and easily makes normal home appliances become intelligent. Can be accessed programmatically or directly by shell, Up to 4 layers can be stacked. The 4 Channel Relay uses high-quality relay modules combined with the most popular microcontroller technology to communicate with the Pi board. , You can use mulitiple relay modules stacked together to add many channels;, The 4 Channel module is very fast, easy to install, and supports multi-language development, making it ideal for smart home projects.