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USB 16 Channel Relay Module - RS232 Controlled
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Amazon.com: 8-Channel 12V USB Relay Board, 8-Channel 12VDC Type-B USB Relay Board Module Controller for Automation Robotics : Electronics
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USB Relay Controller - One Channel
8 Channel USB Relay Module | Numato Lab
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USB Relay Controller - Eight Channel
4 Channel USB Relay Module With GPIO And Analog Inputs | Numato Lab