Actually a cheater board does not have to be as complicated as a special ring or some other gizmo to activate it. Almost ALL cheater boards are done with 2 simple principles.
A set and an activation
The "set" tells the board to ready itself for the code that will tell it how to perform. The "activation" tells it what to do. Most cheater boards have MANY "special" modes in them that the player can select from.
Bluetooth will be the downfall of fair play in the professional leagues. THe leagues need to get together and immediately start blocking those frequencies on the fields along with consumer band radio AND cell phones