If an offender is separated from the device after a very short period of time—and that time period is adjustable—the device sends out an alert. We call it a “bracelet gone” alert, both to the agency and also to the offender. The bracelet vibrates, alerting him to the fact he is out of range of his device. If he's out of range of that device, at that point in time we're no longer tracking the offender. We know where this device is, but we don't know where the offender is.
However, that is a very severe violation. Typically, if an offender walks out of range of his device, he fixes that situation quickly because he doesn't want to suffer the consequences.