4 Channel Relay Module 5V USB Expansion Board – Intelligent Control Switch For PC, Plug-and-Play With Serial Commands

About This Product

If you're into PC-based automation or just need a simple way to control multiple devices from your computer, this 4-channel relay module is a solid choice.

It's a 5V USB expansion board that connects via micro USB – plug it in, fire up your serial debugging software, and you're ready to open or close relays with simple commands.

No drivers to wrestle with, no complicated setup.

Just plug, play, and control up to four separate circuits right from your desktop.

Each relay is rated at 10A 250VAC or 10A 30VDC, so it can handle a good range of appliances and devices.

The onboard microcontroller and USB-to-serial chip make communication stable and responsive, and the built-in overcurrent protection plus diode freewheeling add a layer of safety.

With a lifespan of up to 100,000 pulls, this module is built to last through plenty of projects.

Whether you're building a smart home controller, automating workshop equipment, or just tinkering for fun, this relay board is practical, reliable, and easy to use.