We've been selling quality breathalysers since 1997. In those early days, there were only a small number of fairly primitive units and to get anythinig near the accuracy of modern consumer breathaysers cost a small fortune. In the last 10 years breathalysers have come a very long way and the most difficult part is choosing between them. Rest assured, we stock the best of the best. We won't sell you a cheap low quality unit just to make a quck profit. We thoroughly test each of the models we sell, and many of them don't even make it to our shop.