16 Kanal Wifi Relais Modul mit Optokoppler 5V nützlich für Home Smart Control
12,27 €
2, The use of industry quality isolation optocoupler, anti-interference ability, stable performance; trigger current only 3mA;. 1, With optocoupler protection. i/o port drive low level effective. Low-Level Trigger: Designed for convenience and versatility, this low level trigger relay module supports low-level triggering.
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