Built as a Practical BundleCombines 4 Channel Relay Module with ESP-32 USB-C Boards so users get a more complete starting point for automation switching demos and controlled output projects; Create More Project IdeasUse the bundle for relay switching, automation outputs, smart control demos and load isolation practice, then add IoT nodes, wireless sensors, smart devices and separate code tests as skills and project needs grow; Better Together ValueThe two items complement each other for coding, wiring, testing, rebuilding and moving from basic demos to richer DIY builds; Useful for STEM WorkflowsDesigned for classrooms, robotics clubs, home labs, engineering practice, maker spaces and weekend electronics sessions; Reusable and ExpandableKeep the parts for future projects; check relay ratings, wiring, power limits and safety requirements before use