1. The test results show third gear according to the alcohol concentration LED lights
2. Rapid response and recovery
3. Luminous light
4. Key Chain
Test results:
Green <0.05% BAC
Yellow 0.05% ~ 0.08% BAC
Red ≥ 0.08% BAC

Technical parameters:
Sensor: Semiconductor alcohol sensor
Warm-up time: 10 seconds or less
Response time: 5 seconds or less
Operating temperature: 5 to 40 degrees Celsius
Test range: 0.00% ~ 0.19% BAC
Power: two 1.5V AAA alkaline batteries