Virtual breathalyzer (joke) description

If you are afraid that your friend is drunk and he wants to drive a car - use virtual breathalyzer! This funny tool allows you to set alcohol test results! Just select the alcohol result for you and for your friend! Then tell him to start blowing on the phone. You are sober, but your friend is drunk! It's the best tool when you want to make a joke!

Virtual breathalyzer should be a tool to measure alcohol level. But this breathalyzer is the best way to fool your friends! You can prove that someone is drunk! This is the best alcohol tester made for fun!

How to use virtual breathalyzer when you want to make a joke?
1. Set alcohol level for you and for your friend
2. Start blowing on the phone to check your own result.
3. Change results between you and your friend
3. Allow your friend to blow on the phone. Someone here is drunk!