for each unit you buy ( I think its 30 pings ). After that, you have to pay extra for additional pings. The 3 companys I use is Spireon, GPS Solutions, and Imetrik. Most Buy here Pay here car lots use this. I am not saying this is better than LoJack, its just another solution. LoJack offers a great product. The units I use is great because it leaves a cookie trail of where your car has been and you can disable the engine at any time. This makes a repo very easy.