817 Optocoupler 4 Channel Voltage Isolation Board & Relay Module 4 Channel DC 5V with Optocoupler for Arduino UNO R3

817 Optocoupler 4 Channel Voltage Isolation Board & Relay Module 4 Channel DC 5V with Optocoupler for Arduino UNO R3
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sku: 1005003433296082
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$4.29
Shipping from: China
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