Stay within the limit with the Mini Digital LCD Breathalyser Breath-alcohol test with an audible alert Shows your results on the LCD screen clearly It has a quick response and is fast and simple to use. Small and compact so it is easy to carry Has an auto power off feature to save on battery life Requires 2 x AAA batteries; not included Useful to keep in your car always Save 83% on the Mini Digital LCD Breathalyser for 4.99 pounds instead of 29.99 pounds