Specifications include, but are not limited to: Single body-attached transdermal alcohol monitoring device with a hypoallergenic, adjustable strap to fit all offenders. Able to be worn by individual 24 hours a day, 7 days a week, 365 days a year. Device must be capable of sending a signal indicating a low battery prior to battery depletion and offer a rechargeable or field replaceable battery. Automatically takes an alcohol reading every 30 minutes, 24 hours a day. Anti-tamper technology – strap and circuitry must enable the device to immediately notify the monitoring center of any tamper attempt or removal from offenders’ ankle. Distinguishes between alcohol consumption and environmental alcohol sources. Capable of presenting evidence-based confirmation of sobriety for each 24-hour period. Device must be shock resistant, water resistant, and must function under normal atmosphere and environmental conditions.