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KMtronic Ltd: USB Relay Controller One Channel
KMtronic Ltd: USB Relay Controller One Channel
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fosa 5V 16 Channel USB Relay Module Computer Switch Control, USB Control Switch with PCB Board/High Sensitivity Relays - Newegg.com
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AR-16 Relay Interface
Tebru 8 Channel 12V Type-B USB Relay Board Module Controller For Automation Robotics. - Walmart.com
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USB Relay Controller - Eight Channel
