The number of tagged offenders who commit a new crime is 32 percent lower than among those who are not given the devices, usually worn around the ankles.
Although these criminals are monitored and effectively kept under a form of house arrest, they are allowed to work outside of their homes, or participate in other activities during the day. In the evening, they are obliged to stay at home and forbidden from drinking alcohol.
Offenders are monitored closely through home visits by correctional officers. The scheme is currently only used among released prisoners who have both a home and a job.