The way it work is you ring the phone number of the sim card in the unit,
It then txts you back with co-ordinants and a link for google maps,
We just click the link and it shows you on the map its location(right to the exact parking space its in)
Or just put the co-ordinants into google or whatever and it doesthe same thing,
Or if you txt stop( or something like that) to the number then it triggers the immobilisor,
Then txt it again to switch the immobilisor back again