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USB 4 Channel (10A) Relay Output Module,Board for Home Automation: Amazon.com: Industrial & Scientific
Dollatek Lcus – Type 1 USB Relay Module USB Intelligent Switch Control: Amazon.de: Electronics & Photo
Amazon.com: USB 16 Channel Relay Board for Automation - 12VDC : Electronics
Amazon.co.jp: WXQ-XQ USB Relay Controller, 4 Channel Relay Type B USB 200mAh Relay Board Module 12VDC Power Optional Controller for 5VDC Automation Roboti (#1) : DIY, Tools & Garden
Amazon.co.jp: USB Relay Module HID MCU Control USB Relay 4 Channel Drive Free - 5V : Industrial & Scientific