RF Receiver (315MHz Momentary Type)

Image courtesy of Adafruit

This RF receiver is the easiest possible way to add wireless control to your Arduino project. It can handle up to four channels of remote data. When the corresponding button is pressed on a remote, the matching pin on this module goes LOW. When the button is released, it goes HIGH again.

Buy the 315MHz Momentary Type RF Receiver from Amazon or Adafruit.