Personal Breathalyzer Alcohol Tester with Keychain is simple to use and connects via a convenient keychain and has LED flashlight function. The device has a 3 light system where green, yellow, and red. Portable and convenient to carry on keychain. Easy to use and quick results. Requires 2 AAA 1.5V batteries (not included),
Operations: Press and hold the power button, red and yellow LEDs will light. Exhale into the vent to get your BAC immediately (about 20 seconds). The green LED will keep blinking for "READY" as the unit enters into the testing status.
Colored Light Indication:
Green: under 0.02% BAC
Yellow: over 0.02% BAC
Red: over 0.05% BAC
Includes your 1-color white imprint.