View 1 of 16 Channel Relay Module Walfront Two Way Isolated Type Optocoupler 16 Channel Relay Module Interface Board High/Low Level Trigger DC 5/12/24V 3 Types Optional(DC12V)

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View 1 of 16 Channel Relay Module Walfront Two Way Isolated Type Optocoupler 16 Channel Relay Module Interface Board High/Low Level Trigger DC 5/12/24V 3 Types Optional(DC12V) View 2 of 16 Channel Relay Module Walfront Two Way Isolated Type Optocoupler 16 Channel Relay Module Interface Board High/Low Level Trigger DC 5/12/24V 3 Types Optional(DC12V)