The AlcoSAFE CA10FS Pro Breathalyser is a fantastic, unique addition to the premium breathalyser personal market. Unlike comparable priced models, it uses a fuel cell sensor which offers extremely high accuracy. Featuring an easy-read Bi Colour Safe System (Traffic Light System) that lets you know when you are safe, or above the alcohol driving limit. There is no ‘safe’ alcohol limit. A breathalyser should only be used as a guide to your level of intoxication. If you have consumed any alcohol you should not attempt to DRIVE OR OPERATE MACHINERY.