12v ac/dc Mini Handy little Relay board, ideal for security

24v ac/dc Mini Handy little Relay board, ideal for security / fire alarm systems

5V 12V 24V DC Relay Module 30A High Current Contactor Switch Trigger Board NO/NC

Supco 90-66 Potential Relay 395 Continuous Coil Voltage

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

OCTAL RELAY SOCKET

1 2 4 or 8 Channel 24V Relay Board Module Optocoupler

12V 1/2/4/8 Channel Relay Board Module for Arduino Raspberry Pi ARM AVR DSP PIC