i had one of those fucking things but it was a little different it was a gps tracking one and i had the anklet thing but i had to pack this big fucking receiver box with me everywhere i went which would go off if i got more than 50 ft away. the only reason i had it was because i was on probabtion with a 10 o clock curfew that way they could make sure i wasnt out running aroung drinking and stuff at night which was the whole reason they put me on it