Description
DURABLE: Relay module made of 100% brand new and high quality meterial, with good performance and long service life.
EASY TO USE: High/low level trigger relay board is convenient to use, easy to wire.
STABLE PERFORMANCE: The relay is stable, durable, and compatible, very practical, can bring you more convenience.
PRACTICAL: 4 channel relay board is perfect for your lost or damaged one.
APPLICATION: The 4-channel relay can be used for sending open signal and close signal to 4 relays.
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