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KMtronic Ltd: USB Four(4) Relay Controller
USB 4 Relay controller - thermoregulator with sensor TCN75A
USB Relay Controller 24-Channel 1-Amp DPDT ProXR: Relay Pros - Missing Product Attributes
Amazon.com: 5V 16 Channel USB Relay Module Computer Switch Control, USB Control Switch with PCB Board/High Sensitivity : Electronics
4 Channel USB Relay Module With GPIO And Analog Inputs | Numato Lab
Devantech USB-RLY04 - 4 x 16A USB relay | Acroname
USB Relay Controller - Eight Channel
8-CHANNEL USB RELAY CARD - Whadda
8-CHANNEL USB RELAY CARD - Whadda
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Devantech 8 Channel USB Relay Module | Acroname
Amazon.com: 8-Channel 12V USB Relay Board, 8-Channel 12VDC Type-B USB Relay Board Module Controller for Automation Robotics : Electronics
8-channel 12V USB Relay Module | SainSmart – SainSmart.com
8 Channel USB Relay Module | Numato Lab
Amazon.com: SainSmart USB Eight Channel Relay Board for Automation - 12 V : Industrial & Scientific
