4pcs DC 5V Relay Module - 1 Channel Relay Switch Board with Optocoupler Isolation, High or Low Level Trigger

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SURPLUS INTERNATIONAL TRADING LIMITED is a Hong Kong-based international trading company focusing on 3C electronics. Our product range covers wireless earbuds, bluetooth keyboards, computer mice, power adapters and relays. We serve global importers, distributors and cross-border e-commerce sellers. Backed by mature supply chain resources, we provide bulk wholesale, sample support and flexible logistics solutions. We stick to stable quality, competitive prices and efficient communication to help clients expand their overseas business.