The Draeger 6510 is a Breathalyzer used widely by the Police around the world to measure Breath Alcohol Content (BAC) at an accuracy of ± 0.005%BAC at 0.100%BAC. It can be operated with and without a mouthpiece. It is fitted with a 1/4 inch Draeger alcohol sensor reacts specifically to alcohol, and features very short response times. Even with a very high alcohol content, the device responds quickly with the results. The results are then clearly displayed as unabbreviated text messages on a backlit graphic display accompanied with a corresponding LED color and an audible signal. A push on the ejection tab on the mouthpiece hygienically expels it from the Breathalyzer without any contact between the operator's hand and the subject's saliva. The Draeger Alcotest 6510 fits into a shirt pocket and can be operated by right-handed and left-handed persons without problems. It features a single button easy operation and allows you to retrieve last 10 results. The Alcotest 6510 features efficient power consumption, various sampling modes, language options and test numbering system. A pair of fresh AA Alkaline batteries is sufficient for more than 1500 tests conducted at room temperature. Calibration is recommended every 6 months to ensure the defensibility of the results.