The SCRAM bracelet is a recent innovation in the crime fighting scene. This stands out for Secure Continuous Remote Alcohol Monitor. It is actually more popularized by Lindsay Lohan that served as an alternative to jail time.
Now, you might want to ask what it does. It basically detects alcohol consumption through skin’s sweat. It sends a tracker to the base every 30 minutes. It has a modem installed in the house which would also alarm if the subject wearing it goes out of the radius. It has been launched in 2003 and many states in the US are adapting this technology.