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Red version 1 relay module with optocoupler isolation support high and low level trigger expansion board 5V9V12V24V

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1 channel with optocoupler isolation support high and low level trigger relay module expansion board 5V12V

1 channel with optocoupler isolation support high and low level trigger relay module expansion board 5V12V

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1/2/4/8CH 5V12V24V Relay Module with Optocoupler Isolation Supports High and Low Level Trigger Expansion Board

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DC 5V 12V 4 8 Channel Relay Module with Optocoupler Isolation High Level Trigger Relay Output 4 8 Way Relay Module For Arduino

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