Plug-and-play via USB (power + communication). Includes USB cable, wires, and screwdriver for immediate use. Clear terminals and modular design simplify wiring, expansion, and maintenance. Built with high-quality components, it offers stable performance and strong anti-interference. Modbus RTU enables precise control and flexible networking, while USB/TTL connectivity supports easy secondary development. Widely used in industrial automation, smart homes, and power management. It enables remote equipment control and smart system integration, ideal for both professional and DIY projects. This base-version USB Relay Module is an industrial-grade control board for automation/PLC projects. Supporting Modbus RTU and USB/TTL interfaces, it features DIN rail mounting for reliable remote control. Rigorously tested for reliability, it operates stably from -20℃ to 70℃. Comes with manuals, open-source code, and reliable after-sales support, ensuring a worry-free user experience., Weight: 0.3086471668 pounds, Manufacturer: Ehwisbe