The 5V, 7A relay module is a separate hardware device used for device switching. With it you can remotely control devices over a network or the Internet. Devices can be remotely powered on or off with commands.

Relay modules board is used to operate any device/ appliances on-off state.

• Triggering voltage  5V or 3.3V SIGNAL
• can operate 7A current 
• LED Status indicators to indicate the relay ON/OFF status

Pin description:

1. +5V
2. Input (from Microcontroller or arduino +3.5 to +5.5v)
3. GND