USB Relay Module, 12V 8 Channel Driver free Module Programmable Computer Controller Switch PC Intelligent Control for Smart of Home, Hotel, Shopping Mall, Company, Plant

This board is designed with square type-b USB interface, stable connection. It uses imported high-performance USB control chip. High quality relay and dedicated relay driven ULN2803 chip ensure relay to work more stably. There are two flexible and convenient power input methods, power socket and terminal. After connecting the power supply, relay can maintain the setting state even if the computer is power off or USB is disconnected from computer.