KMtronic Ltd: USB Eight Channel Relay Controller - RS232 Serial controlled - 12V
USB 32 Relays
USB 16 Channel Relay Card, 16 Relay Serial, Virtual COM/Serial Port (VCP) - 12v | eBay
USB 4 Relay controller - thermoregulator with sensor TCN75A
USB 16 Channel Relay Card, 16 Relai Serial, Virtual COM Port 12v | eBay
USB Eight Channel Relay Board for Automation
USB Relaiskarte, Grieder Elektronik Bauteile AG
Amazon.com: ASHATA Relay Module, 4-Channel 12V Computer USB Smart Switch Controller PC Relay Module Expansion Board Use Imported High Performance USB Control Chip. : Industrial & Scientific
USB Relay Controller Board - 4 Channels for Home Automation