1-10 Stück DC 12V USB Relais 8 Kanal Programmierbare Computer Steuerung für Smart Home
ab 11,55 €
3 Use the special relay driver chip ULN2803, relay work more stable. After connecting the power, even if the computer off or unplug the USB from the computer, the relay can also remains set. 4 Using genuine Songle relay.
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