Introducing our 12V Low Level Trigger One Channel Relay Module Interface Board Shield, designed to meet international safety standards with isolated control and load areas. Featuring a genuine Songle relay, this module provides clear power and relay action instructions. With signal input terminals, it enables microcontroller development board usage for home appliance control. Capable of controlling DC or AC signals, including 220V AC loads, it offers both normally open and normally closed contacts. The blue KF301 terminals ensure convenient control line connection.