i have a unit lying around somewhere!!!!!!
Basically when i had my last car, i had under car neon's, i also paid for a an aditional kit which came with a key fob part.... the idea was that you could wire it into the neon's and you could turn them on or off from about 60 metres away!!!!
However, the instructions supplied showed how to connect it to other things such as remote engine start, turn on stereo etc!!!
it was only about another £40 on top of the neon kit, and i think they sell the unit seperatly!