The AlcoMate® Prestige breathalyzer is the original device in our product line that showcases patent-pending pre-calibrated replaceable sensor module technology. The AlcoMate® Prestige breathalyzer is DOT Approved for law-enforcement grade accuracy and US Coast Guard Approved to satisfy the requirements of all marine vessels in US waters to have a breathalyzer-on-board. The Problem with Re-Calibration One of the most important things to understand when using a breath alcohol tester is that all typical breath alcohol sensors require periodic re-calibration in order to maintain accuracy. It is inherent to alcohol sensing technology, much like gasoline engines in cars require oil changes in order to function properly. Most breathalyzers have to be physically mailed to a service center along with a fee to get this re-calibration done, and you will be without your breath alcohol tester until the service is done. Even if re-calibration is done on schedule, the service does not restore any wear on the alcohol sensor, and eventually your breathalyzer will fail completely due to the sensor breaking down. The Solution: Pre-Calibrated Replaceable Sensor Modules! (US Patent #7,841,224B2) The AlcoMate® Prestige eliminates the problems of re-calibration by eliminating the need for re-calibration completely! No more downtime, no more back-and-forth mailing, no more gradual sensor breakdown, because you replace each sensor module with a new pre-calibrated one each time! Because the sensor modules are pre-calibrated, there is nothing you have to do but simply swap out the old one with the new one. Prestige Features • DOT Approved for Law Enforcement: Accuracy +/-0.01 at 0.10%BAC • US Coast Guard Approved • Pre-Calibrated Replaceable Sensor Module Technology • 3-Digit LED Results Display • Active Pressure Sensor / Deep Lung Air Sampling • Cumulative Test Counter • Low Battery Indicator / Auto Power-Off