Power Relay Expansion Module for Raspberry Pi, Relay Board with Dual Cooling Fans & Auto Color Changing LED, Compatible with Pi A+, 3A+, B+, 2B, 3B, 3B+, 4B

This power relay expansion module is specially engineered for Raspberry Pi boards, supporting Raspberry Pi A+, 3A+, B+, 2B, 3B, 3B+ and 4B. It expands relay control functions, allowing makers, students and electronics hobbyists to conveniently switch external electrical loads. It is widely applied in smart home control, experimental testing, robot development and various DIY automation projects.

The module is equipped with dual cooling fans to continuously lower surface temperature under continuous working conditions. It effectively avoids overheating risks caused by frequent relay activation and heavy load operation, boosting overall working stability and extending service life. Integrated auto color changing LED lights display different colors according to operating states, so you can quickly identify working conditions without additional testing tools.

Adopting standard pin layout, the module can be stacked directly onto Raspberry Pi for quick assembly. No complicated wiring transformation is needed for basic usage. High-quality relay chips deliver stable switching performance to satisfy most small-load control demands.

Constructed with compact size, it saves installation space and fits embedded development projects easily.

Important Notice: Please strictly follow the rated load parameters when connecting external devices to prevent overload damage to the module.