USB Relay Board - High Power USB Relays for Industrial Applications
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USB 4 Relay Board for Home Automation - v2
KMTronic USB Two Relay Board for Solenoid Control
USB Control Switch 2-Channel 5V Relay Module
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USB 16 Channel Relay Module - RS232 Controlled
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USB Control Module 1 Channel 5V Relay Module – Kuongshun Electronic Shop
USB 8 Channel Relay Board
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USB Relay Controller Board - 4 Channels for Home Automation
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ICStation MICRO USB 5V 4-Channel Relay Module USB Control Relay Module ICSE012A - Relay Module - Arduino, Robotics, Raspberry Pi, ESP8266, Learning DIY, Development board ICStation
USB Eight Channel Relay Board for Automation
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