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KMtronic Ltd: USB Relay Controller One Channel
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ADU200 USB Relay I/O Interface Module ( 5 AMP )
USB Relay Controller 16 Channels - Virtual Serial /COM/ Port, optical isolation | eBay
USB Relay Controller - Two Channels
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Zerodis USB Relay Control Switch, USB Relay Module, Double-Sided Circuit Board For Industry Serial Port Control Relay Module Home Serial Port Communication - Walmart.com
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4-Channel USB Relay Board with 6-Channel A/D Interface
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KMtronic Ltd: USB Relay Controller One Channel
TSRU430- 4 Channel 30A USB Relay Board
USB Eight Channel Relay Board for Automation
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USB Relay Controller Board - 4 Channels for Home Automation
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USB Relay Controller with 6-Channel I/O - DEV-09669 - SparkFun Electronics
USB 4 Relay Board for Home Automation - v2
32 Channel USB Relay Module
