STIwanabe

I'm considering having a tracker monitor installed in my RB5, the dealer i bought it from can do me a good deal if i get them to fit it.

Anyway, i know trackers uses radio signals instead of GPS and the tracker monitor had movement sensors so if they think its been nicked they phone you up, but how do they know its been stolen and your not driving??
Is there a way of switching it off i.e. enter a pin number into a Keypad or something???