In/Out Shield for your Arduino, Velleman.

4 Channels 5V Relay Module

Shield of relays for Arduino, with 2 channel mechanical relays and with 2 channel MOS switch , providing an easy way for applications low and high voltage control. 

Mini Relay with 6V Output, Dual Channel.

Light Sensitivity Switch Kit, Velleman.

8 relay module with ports " NC " means " Usually connected to COM " and ports "NO" means " Usually open to COM ".

One Relay Module of 1 Channel Low Level Trigger 12V.

Solid State Relay - 8 Channels

DFRobot Relay Shield  V2.1 is a completely new design which is capable of controlling 4 relays at a time.

The Hexa base rotation kit is perfect for rotating a large mass. It can easily support 5kg . It is injection molded from ultra strong ABS plastic .

Mini Rboard ATMega328P

Relé DIL Selado, compacto p/ montagem PCB

ESP8266 WiFi Remote Control Module with 220V Relay