5V/12V/24V Relay Module with Optocoupler 1/2/4/6/8/16 Channel for Arduino Pi UK

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DC 12V Relay Module 4 Channel Relay Board Shield with Optocoupler Isolation

4 Channel Relay Module 5V 12V Board Shield with Optocoupler Isolation6816

1/2/4/8 Channel Relay Board Relay Module with Optocoupler High Low 5V 9V 12V 24V

4 Channel Relay Module 5V 12V Board Shield with Optocoupler Isolation4449

1/2/4/6/8 Channel 5V Relay Board Module Optocoupler LED for Arduino PiC ARM AVR