Sometimes it's hard to tell if you are over the limit or whether your good to drive. Keep yourself safe by keeping this handy Breathalyzer at your side. Small and convenient, this pocket sized device is perfect to store in your glove-box. This super accurate device provides a versatile array of data, simply breathe into the device for readings of your blood alcohol concentration (BAC), breath alcohol concentration (BrAC) or milligrams per litre (mg/L). The blue backlit display is easy to read and the Breathalyzer comes with 5 hygienic mouthpieces.