Description The BACtrack Go Keychain Breathalyzer is compact, convenient, and provides blood alcohol content (BAC) results in seconds. A fully functional breath alcohol tester, BACtrack Go is equipped with an Advanced MicroCheck alcohol sensor that determines BAC quickly and accurately. To use, simply wait 15 minutes after your last drink, power on button, then breathe into its innovative folding mouthpiece. Your results are displayed in seconds – it's that easy! BACtrack Go's ultra-compact design means it fits inside a purse or pocket, and can be used as a keychain. Learn how alcohol affects your body and drink more responsibly. Cheers to good decisions.