- A measured volume of air is blown through the glass test ampoule filled with reactive yellow crystals, which turn green in the presence of alcohol.
- If the colour change extends beyond the red line calibrated on the tube, then it indicates a blood alcohol level of more than the standard calibration.
- Taking the test is quick and easy and requires no training.
- The results are immediate, reliable and accurate.
- The device is hygienic as it is only used once and the cost is low – COSTING APPROXIMATELY THE SAME AS A DRINK.