50PCS KY-019 5V 1-Channel Relay Module Opto-Isolated For Arduino/Esp32/Raspberry Pi Home Automation Low/High Level Trigger

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50PCS KY-019 5V 1-Channel Relay Module Opto-Isolated For Arduino/Esp32/Raspberry Pi Home Automation Low/High Level Trigger

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50PCS KY-019 5V 1-Channel Relay Module Opto-Isolated For Arduino/Esp32/Raspberry Pi Home Automation Low/High Level Trigger

50PCS KY-019 5V 1-Channel Relay Module Opto-Isolated for Arduino/ESP32/Raspberry Pi Home Automation Low/High Level Trigger