Freeshipping 10PCS DC 4.5-40V To 5V 2A USB Charger DC-DC Step-down Buck Converter Voltmeter Module

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10pcs automatic protection! dc 4.5-40v to 5v 2a usb charger led step-down buck converter voltmeter module low power

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Automatic protection! dc 4.5-40v to 5v 2a usb charger led step-down buck converter voltmeter module low power

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