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KMtronic Ltd: USB Relay Controller One Channel
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8-channel 12VDC Type-B USB Relay Board Module Controller Automation Robotics | eBay
SH-UR01A USB Relay Controller for Computer and Laptop(1CH) - Walmart.com
USB 4 Relay controller - thermoregulator with sensor TCN75A
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IA-3131-U2i - 32-Channel USB Relay Controller USB and RS-232 Controlled Daisy-Chain Series
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Industrial Relay Controller Board 32-Channel SPDT + UXP Expansion Port - NCD Store
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Amazon.com: DSD TECH SH-UR01A USB Relay Controller for Computer and Laptop(1CH) : Electronics
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8 Channel Ethernet Relay Controller (Support PoE and USB) - DFRobot
