Miscellaneous Electronics

one 1 channel relay module DC 5V 9V 12V 24V high and low level trigger relay control with optocoupler red one 1 channel relay module DC 5V 9V 12V 24V high and low level trigger relay control with optocoupler red one 1 channel relay module DC 5V 9V 12V 24V high and low level trigger relay control with optocoupler red