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USB Relay for Windows, Mac, and Linux - Industrial Grade
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diymore 8 Channel Relay Board Type B USB Programmable ULN2803 Relay Driver Chip for Arduino Smart Home DC 12V|usb relay|controller 12vcontroller programmable - AliExpress
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KMtronic Ltd: USB Relay Controller One Channel
USB Eight Channel Relay Board for Automation
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USB Relay Board
