Product · United States

4-channel RS232 Serial Port Relay Control Board Smart Home Control Switch DC9-30V Computer Connection Relay Module

Lowest price: $27.21 · 1 store · price range $34.71 … $34.71 · 22% off the list price

Price history: 3 daily prices tracked since 2026-10-18; lowest $27.21, highest $27.77.

Price last confirmed by the store feed on 2026-10-31.

Prices across stores

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