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DC 5V 7.5V 9V 2Ch RS232 Relay Board Remote Control USB PC UART COM Serial Ports
S$ 13.00
RS232-Relay
8CH DC 12V RS232 Relay Module Serial port Remote Control Switch
S$ 19.50 to S$ 23.41
DC 5V 12V 8ch Modbus Rtu UART TTL232 IO Control Module for arduiuo
S$ 3.88 to S$ 3.89
TYPE-C USB Relay Module DC 5V 12V PC UART Serial Port RS232(TTL) Switch Board
S$ 5.06 to S$ 6.49
2 PCS 16ch 12V RS232 Serial Port DB9 Relay Board UART Smart Switch Module LED
S$ 74.15