The ACE DA7100 is equipped with an electrochemical sensor, as it is also integrated in police pre-test devices. This sensor provides very accurate test results with a max. tolerance of ± 0.05 per mille. The ACE DA7100 is in no way inferior to the breathalysers used by the authorities. It can be easily taken anywhere at any time, as it fits into any shirt or trouser pocket. The surface is smooth, but still provides sufficient grip and hold. The design of the ACE DA7100 is kept simple, with no superfluous features. It is simple, straightforward and clearly laid out. The use of the ACE DA7100 is very easy due to the one-button-operation. The breathalyzer can be operated equally well by right-handed and left-handed people, because the start button is located on the front and can be easily reached from both sides with the thumb. The large and brightly illuminated display allows testing even in the darkest conditions.