This 5V 1-Channel Relay Module is a reliable and easy-to-use switching device designed for Arduino, Raspberry Pi, and other microcontroller projects. It allows you to control high-voltage appliances such as lamps, fans, motors, and pumps safely using a low-voltage control signal. Built with a high-quality JQC-3FF-S-Z relay, it offers stable performance and long service life for all your DIY and automation applications.