The 5V relay module is suitable for SCM development, and home appliance control. It is with a 5V~12V TIL control signal which can control DC / AC signal. The module is perfect for common applications. It has an 5V-12V TTL control signal that can control DC/AC signal. This 5V relay can control 220V AC load which is useful to control a motor, a led strip, or any other module. 

The relay can control any device just like a switch contact. Its contact is isolated from the driven circuit. This relay features an LED Indication of Relay ON. Direct input from 3-5V Microcontroller for relay control. The output terminal for relay contacts. Provision of 2x3Pin male header for wire connection. Powered from external 5V or from the male header. The relay has a contact rating of 5A at 240V AC

Note: It is important that the microcontroller share ground with the relay board along with other control signals else it will not able to control the relay.