There are just 3 steps to the Alcohol Test which yoiu can keep handy attached to your keys Its very easy to use just hold the power button until the LED turns greennbsp Blow across the top of the grillnbsp If the light remains green you should be OK to drivenbsp If it turns yellow you need to be cautious & think about taking the bus or getting a taxi homenbsp If the LED turns red & yellow you probably should walk home
- the cold may help sober you up This item requiers 2 x AAA batteries