KMtronic Ltd: USB Eight Channel Relay Controller - RS232 Serial controlled - 12V
Amazon.com: KNACRO 12V 8 Channel USB Relay Module Programmable Computer Control omputer USB Control Switch/Driver/PC Intelligent Controller-Pack of 20Pcs : Electronics
Dc 12v 8 Channel Usb Relay Module Computer Controller 300ma Double High Current Rail - Integrated Circuits - AliExpress
Relay Controller,USB Relay Switch 12V 8 Channel Relay Module with USB Interface Drive-Free for Computer Smart Control Switch: Amazon.com: Industrial & Scientific
8 Channel USB Relay Module | Numato Lab
Relay Switch Controller Pc | Usb Relay Control Switch | 24v Programmable Relays - 5v 12v - Aliexpress
DC 12V 8 Channel Relay Module USB Computer Control Board for Home Automation - Walmart.com