- Auto power off: 35 seconds approx. - Dimension: 95 x 36 x 18 mm. WARNING: the maximum warning level BAC (blood alcohol content) while driving a vehicle EASY TO USE: Simply ensure you have inserted batteries, then just attach BLO-UK Alcohol Breathalyzer and Portable Breath Tester with Digital LCD Screen. (3) Breath inhaler (4) Battery compartment Digital alcohol test with audible alert Please tie the plastic pole with the hand harness(included). Try this demonstration to recreate an early 'breathalyser' test, probably more for teacher background, of breath testing for alcohol, from the historyA calibration check must be run for each subject tested. 2. For each person tested, a complete breath-alcohol test must consist of 2 separate breath samples Press the power button once, the alcohol tester LCD LCD will turn on with one beep sound. 2. The “warm up” symbol is displayed, and starts the 9 to 0 countdown. Please note: The readings from this blood alcohol level tester, if used and calibrated as instructed, should provide an indicative guide to the level of alcohol Determines how much alcohol is in your blood by measuring the amount of alcohol in the air you breathe out (exhale). • Digital alcohol test with audible alert.