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USB Module - 8 Relays
Devantech USB-RLY06 - 6 x 16A USB relay | Acroname
USB Eight Channel Relay Board for Automation
16 Channel USB Relay Module With GPIO And Inputs | Numato Lab
Amazon.com: 8CH 12V USB Relay Module Controller FTDI chip Relay Controller Type B USB Relay Board Module Controller for Automation Robotics : Industrial & Scientific