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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
8-CHANNEL USB RELAY CARD - Walmart.com
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TOSR04 - 4 Channel USB/Wireless 5V Relay Module
4-Channel USB Relay Board with 6-Channel A/D Interface
USB Relay Controller - One Channel -PCB- HyperTerminal ASCII commands
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Amazon.com: Diyeeni 4-Channel 12V USB Control Switch Relay Module, Relay Board Computer Smart Switch Controller, PC Relay Module Expansion Board, Relay Board for Automation : Electronics
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Relay Boards With I/O :: 8 Channel USB Relay Board W/ISO Input Port and DC Power Terminal Block
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USB 4 Relay Board for Home Automation - v2
