4 Channel DC 5V Relay Module With Optocoupler Isolation Support AVR/51/PIC Microcontroller Low Level Trigger Expansion Board

4 Channel DC 5V Relay Module With Optocoupler Isolation Support AVR/51/PIC Microcontroller Low Level Trigger Expansion Board
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sku: 4000467890162
$1.81
Shipping from: China
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