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4 Channel 5V Relay Module - Wiki
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Universal SPST 80 Amp 4 Pin Relay 12V Hi-Amp
Inland 4 Channel 5V Relay Module for Arduino - Micro Center
Amazon.com: SainSmart 4-Channel Relay Module : Automotive
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5V Four-Channel Relay Module - Pin Diagram, Specifications, Applications, Working
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4 Relay Module 30A | Makerfabs
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Grove - 4-Channel SPDT Relay | Seeed Studio Wiki
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4-Channel Lora Relay 10A | Makerfabs
4-Channel Relay module - Geeetech Wiki
4 Channel 5V Relay Module
LR4: 4-Channel Latching-Relay Module
