The Pololu Mini IR Remote Control is a range of miniature IR remote control modules that are compatible with the RC5 protocol and offer a range of features. These include interchangeable buttons, multiplexing capability, and a highly programmable processor. With their ultra-small size and simple operation, these modules help make it easy to add remote control functionality to your projects. The Mini IR Remote Control is available in six versions: one for use with a 3.3V microcontroller, four for use with 5V microcontrollers, and one for use with a 9V battery. Each version includes a transmitter, receiver, and IR LED.