Test winner: In a study by TU Vienna, the ACE II Basic Plus scored as a test winner with a measurement accuracy of 99.0%. In the same study, this alcohol tester was in no way inferior to police devices Professional sensor: the electrochemical sensor is the heart of this alcohol tester and ensures maximum accurate results. Electrochemical sensors are also installed in the pre-testers of the police Box contents: in addition to the alcohol tester ACE II Basic Plus, two matching AAA batteries, 5 mouthpieces, a soft case, a carry case and instructions (German and English) PRECALIBRATED Our digital alcohol test is shipped calibrated for 1 year with a maximum deviation of only 0.05 per mille. For sustained accuracy, we recommend regular calibrations Professional device: due to the high accuracy, ideal for For addiction clinics, doctor's practices, youth institutions and authorities, but also for self-control for residual alcohol in the morning after!