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USB Relay Controller - Two Channels with clips for DIN mount rail
USB Control Switch 2-Channel 5V Relay Module
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2 Channel USB Powered Relay Module With GPIO | Numato Lab
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2 Channel USB Relay Module With GPIO And Analog Inputs | Numato Lab
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USB Relay 2 Channel Programmable Computer Control. Windows and Linux drivers
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USB Relay Controller Board - 4 Channels for Home Automation
Devantech USB-RLY82 - 2 Channel USB Relay | Acroname
2 Channel USB Powered Relay Module With GPIO | Numato Lab
