The ACE II Basic Plus is equipped with an electrochemical sensor that is also integrated into police breath testing devices. This sensor allows for very accurate measurement results with a tolerance of no more than +/- 0.05 per mille. With such values, the ACE II Basic Plus is in no way inferior to police devices. Using the ACE II Basic Plus is incredibly easy; the one-button operation ensures simple handling of the device. It can be easily operated by both right-handed and left-handed users. Turning the device on and off, as well as displaying previously completed measurements, can be done with just one button. The large, brightly lit display allows tests to be conducted even in the dark. The measurement accuracy was verified according to an alcohol tester accuracy study conducted by the Technical University of Vienna in October 2015. In this study, five measurement reference points (0.00, 0.10, 0.25, 0.40, and 0.60 per mille) were tested with five identical measuring devices, each with ten repetitions in the laboratory. Overall, the device type was tested 250 times in the laboratory of the Institute for Analytical Chemistry at the Technical University of Vienna.