433MHz for Arduno Remote Control UART PC USB RF Wireless Relay Controller PT226
14,22 €
Inter-locking (Latch): 4-way relay each other to switch, when relay A is working and locked, relay B C D corresponding to switch off; when B is working and locked, corresponding relay A C D swith off ; Only 1 relay is on among 4 relays A B C D;.
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