1 channel Optocoupler Relay Module Support high and low trigger DC 5V/9V/12V/24V

DC 5V/9V/12V/24V 1 channel Optocoupler Relay Module Support high and low trigger

1/2/4/8 Channel Relay Board Relay Module with Optocoupler High Low 5V 9V 12V 24V

1/2/4/8 Arduino Pi Channel Relay Board Module Selectable High Low 5V 12V 24V

5V/12V/24V Relay Module with Optocoupler 1/2/4/6/8/16 Channel for Arduino Pi UK

12V 1 Channel Relay High&Low Level Trigger Module With Optocoupler Isolation

12V 1 Channel Relay Module with Optocoupler Isolation High and Low Trigger UK

1 channel 12V Relay Module, Opto-coupler isolated, for Arduino and MCU projects.