4pcs Relay Module DC 12V Relay Board 1 Channel with Optocoupler Isolation Suppor

Relay Module 4 Channel DC 5V with Optocoupler for Arduino UNO R3 MEGA Project 12

12V 4 Channel Relay Module Optocoupler High Low Trigger

5V/12V/24V Relay Module with Optocoupler

8 Channel 12V Relay Module with Optocoupler for PLC Automation

2 Channel 5V Relay Module with Optocoupler Adjustable Timer

6pcs DC 12V Relay Module 2 Channel Relay with Optocoupler High or Low Level Trig

1pcs DC 12V Relay Module 2 Channel Relay with Optocoupler High or Low Level Trig