Rf Module 315 mhz consist of transmitter and receiver module used  for transmitting  data via RF. Its frequency range is 315mhxz. They easily fit into a breadboard and work well with microcontrollers to create a very simple wireless data link. They are mostly used in Wireless calling system, burglar alarm, wireless data transmission, automated data acquisition system , DIY projects and many more. It has wider range of working voltage with stable performance.

The module helps to communicate with Arduinos wirelessly. It is mainly transmit and receive the data because it has high volume of application than IR. RF signals travel in the transmitter and receiver even when there is an obstruction. It operates at a specific frequency of 433MHz.