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FainWan 2pcs 2 Channel Relay Module with Optocoupler 5V Active Low Level Amplifier Trigger JD VCC Relay Power VCC Power auspowers_batchfive Slide them all the way dingo Slide them all the way in and they should “lock” in place polypropylene is convenient to control all kinds of electrical appliances and large current devices LED light is used to indicate the relay output state
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