One Step is a disposable breathalyser used to measure blood alcohol content from a breath sample - readouts for 0.0, 0.2, 0.5 and 0.8 see chart for every Country in EU.
The test must be performed at least 15 minutes after last consuming alcohol
One Step is designed for personal use
Multi-language instruction - English, German, French, Spanish and Italian
Multi read out so covers ALL Europe not just France or Scotland