An alcohol ankle monitor—also known as a SCRAM (Secure Continuous Remote Alcohol Monitor)—is an ankle bracelet consisting of two small boxes secured by a strap and worn 24 hours a day. A SCRAM monitors perspiration on the skin for alcohol content—similar to the way a breathalyzer test measures blood alcohol concentration. A SCRAM is tamper-resistant and if a person attempts to remove or tamper with it, the tampering will be detected and reported through the remote monitoring service.

A person who is out of jail on bond awaiting a DUI/DWI trial may be ordered to wear a SCRAM. And a person who has been convicted of a DUI/DWI criminal offense may be ordered to wear a SCRAM for some period of time—as a condition of probation, for example. A person convicted of a DUI/DWI criminal offense may also volunteer to wear a SCRAM in an effort to reduce the severity of the sentence.

In Oregon, SCRAM (Secure Continuous Remote Alcohol Monitor) devices are used as a part of the state's monitoring options for individuals who have been charged with or convicted of DUI/DWI offenses. The use of a SCRAM device can be mandated by the court as a condition of pretrial release, probation, or other court-ordered supervision. It functions by measuring the alcohol content in perspiration and is designed to be tamper-resistant. If an individual attempts to remove or tamper with the SCRAM device, it will trigger an alert to the monitoring service. Additionally, some individuals may voluntarily choose to wear a SCRAM device to demonstrate sobriety and potentially mitigate the severity of their sentence. The specific conditions under which a SCRAM device is required, and the duration of its use, are determined by the court on a case-by-case basis, taking into account the circumstances of the offense and the individual's legal history.