DC 5V 2 Channel RS232 Serial Control Relay Switch Board SCM PC Relays

NEW MICRO USB 5V 4-Channel Relay Module USB Control Relay Module serial port

MICRO USB 5V 4-Channel Relay Module USB Control Relay Module serial port

2 Channel Serial Port Control Relay Module RS232 Opto Relay Board With For MCU

12V Automotive Changeover Relay 40/80A 5-Pin SPDT Switching Relays Bike Car Van

Omron Plug In Non-Latching Relays and Omron 2 Pin Relay Sockets - 8 FOR SALE

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DC 12V 2Ch RS232 Relay Board Remote Control USB PC UART COM Serial Ports