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Amazon.com: HiLetgo 2pcs DC 12V 2 Channel Relay Module with Isolated Optocoupler High and Low Level H/L Level Trigger Module Triggered by DC 12V : Industrial & Scientific
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DC 6V~30V Multifunction Trigger Delay Time Module Switch Control Relay Cycle Timer Digit LED Display Micro USB 5V: Amazon.com: Tools & Home Improvement
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NOYITO 4-Channel 12V Computer USB Control Switch Relay Module Drive-Free Relay Module Plug and Play Suitable for PC Smart Controller: Amazon.com: Industrial & Scientific
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NOYITO 2-Channel Micro USB Relay Module USB Smart Control Switch USB Intelligent Control Switch (2-Channel Micro USB): Amazon.com: Industrial & Scientific