The IC used on these boards is a PIC - progammable IC.
1776 sell the board, and include a
pre-programmed PIC with it. These ICs can be programmed to perform all sorts of tasks, and are commonly used for "home" robotics - everything from controlling your fridge to TV or automotive applications.
You can easily buy these ICs, but they need to be programmed. For that you need a PIC or AVR programmer, and the knowledge of how to write a progamme to control the relay.