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NOYITO 4-Channel 12V Computer USB Control Switch Relay Module Drive-Free Relay Module Plug and Play Suitable for PC Smart Controller: Amazon.com: Industrial & Scientific
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USB Relay Module – 4/8 Channels | USB Digital Output Module
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USB Relay Controller Board - 4 Channels for Home Automation
8 Channels Dc 12v Relay Module / Computer Usb Type-b Control Switch Driver Pc Intelligent Controller Dc 12v Board For Smart Home - Relays - AliExpress
KMtronic Ltd: USB Relay Controller Two Channel
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NOYITO 4-Channel 12V Computer USB Control Switch Relay Module Drive-Free Relay Module Plug and Play Suitable for PC Smart Controller: Amazon.com: Industrial & Scientific
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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