itll alert anyone that is in it for some time that a "device is tracking your movement".Read about doing this but i saw where anyone with an iphone can detect them. Have you heard of this happening or have tried it ? Thats what has kept me from committing lol
I had a friend use one on his backpack and it alerted me after 15 min in the car with me that my location was being tracked. But will not let me take control of the device.