Relay Module
Class
Class：
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5V 30A Relay Module Type A (normally open) Optocoupler Isola -
5V 30A Relay Module Type C (complete) Optocoupler Isolation -
Original Omron G2R-1-E 12V 5A 1 Channel Relay -
5V 4 Way Bluetooth Relay Module IoT Smart Home Mob App Contr -
12V 30A Relay Module Type A (normally open) With Optocoupler -
12V 30A Relay Module Type C（completed）With Optocoupler