4pcs 12V 4-Channel Optocoupler Isolated Relay Module for DIY Development

4pcs 4 Channel 12V Optoisolated Relay Module for Microcontroller Projects

12V 4-Channel Optocoupler Isolated Switch Module for Electronic Development

4-Channel 12V DC Switch Board with Optocoupler Isolation for Prototypes

4 Channel USB Relay Board for Controlling High Voltage AC and DC Loads

DIN Rail Timer TM610 Dual Channel Control with LCD and 24V-240V Support

6PCS 2-Channel Opto-Isolation Module, power level Control Adapter Module, Driver

24V 8-Channel Relay Control Module for Electronic Controller Prototyping Tasks