Fangrui Product Details Advanced Functionality: This Usb/ttl Control Relay Is Designed For Robust Industrial Applications, Featuring 8-way For Versatile Use Across Automation Tasks. Wide Compatibility: Ideal For A Broad Range Of Automation Applications, Ensuring Seamless Integration With Existing Systems And Processes. Easy Programming: User-friendly Interface Allows For Easy Programming, Making It Accessible For Both Beginners And Experienced Users. And Reliable: Built To Withstand Industrial Environments, Ensuring Long-lasting Performance And Reliability. Supply Voltage:5v Power Supply Method:type-c Interface Or Pin Header Control Interface:type-c Port (usb) Or Pin Header (uart) Communication Protocol:usb Cdc Class Virtual Serial Port Protocol Or Uart Protocol Control Chip:gd32f103c8t6 U5b Rate:usb2.0 Full Speed Transfer Rate (12mbps) Uart Baud Rate:115200bps Led Indicator:power Indicator And Relay Status Indicator Circuit Design:onboard Freewheeling Diode And Optocoupler Protection Function Output Type:relay Common Termina