Description:1. The module adopts relay control, the maximum AC voltage is 250V, the maximum AC current is 10A, the maximum DC voltage is 30V, and the maximum DC current is 10A;2. It is driven by 8550 triode, with strong driving ability;3. Equipped with fixing bolt holes for easy installation4. Power indicator (green), relay status indicator (red)5. The blue KF301 wiring terminal is more convenient to connect to the control line.Instructions for use:1 VCC external 3V2 GND External GND3 1N relay control interface connects to the IO port of the single-chip microcomputer (active low)Package List:Relay module x1