2Pcs DC 24V 1 Channel Relay Module with OPTO Isolation Support High or Low Level

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5V 1 Channel Relay Module Optocoupler Isolation High Low Level Trigger 250V 10A

24V Relay Module Optocoupler Isolation 1 Channel High Low Color: 1 Channel 24V

24V Relay Module with Optocoupler Isolation, 1 Channel High/Low Level Trigger...

1/2/4/8/16Channel 5V 20A Relay Module Board For Arduino Raspberry Pi ARM AVR DSP