The breathalyzer is a device that used to measure the amount of alcohol in the bloodstream. Usually, this device is mostly used by law enforcement, to determine whether the driver was drunk or not and it also as an indicator whether the driver is legal and safe to drive their vehicle.
Fortunately, now with Breathalyzer Keychain Car Gadget in your hand you can test your and your friend blood alcohol concentration, before one of you driving a vehicle. This breathalyzer has a traffic light readout style system making it super easy use. As simple as just blow for 5 seconds then wait. The green light indicates that you are good to go, the yellow is mean that you have to hold on for a while before you are starting to drive your vehicle, and if you got a red light it mean you should take a nap first or hand your keys to your friend who got a green light. The Breathalyzer Keychain Car Gadget also comes with a stopwatch, and a red LED flashlight.
The Breathalyzer Keychain Car Gadget powered by two AAA batteries. If you need one, you can buy it from ChinaVasion for only $2.83 each piece.