Relay Module Interface Boards for Arduino Low Level Trigger 1/2/4/6/8 Channels

High Low Level Trigger 5V/9V/12V/24V 1/2/4/8 Channel Relay Module w/Optocoupler

30A 1/2CH Relay Module Optocoupler Isolation High Low Trigger 5/12/24V 100-250V

DC5V 9V 12V 24V 1/2/4/8 Channel Relay Module High Low Level with Optokoppler

12V 1 Channel Relay Module Optocoupler High/Low Trigger – Free Shipping USA

For High Low Level Trigger 5V/9V/12V/24V 1/2/4 Channel Optocoupler Relay Module

High Low Level Trigger 5V/9V/12V/24V 1/2/4/8 Channel Relay Module +Optocoupler