1. Professional Alcohol Tester: 0.00%-0.19%BAC (0.0-1.9 g/L) detecting range with 0.01%BAC accuracy. The test result can be switched between g/L and mg/mL. 2. Safe and Easy to Use: Blow for 3-5 seconds near the detector port, then wait a few seconds for the result. No contact testing is required. 3. Portable and Reliable: Compact design and portable size with an advanced sensor to ensure measurement accuracy and convenient use. 4. Result Indication: If the result is 0.02%-0.05%BAC (0.2-0.5 g/L), the screen displays Caution. If the result is 0.05%BAC (0.5 g/L), the screen displays Danger, with a sound and light alarm. Use scenarios: - Before driving after a social event to determine if it is safe to operate a vehicle. - Home or small workplace screening to check safety before activities that require focus and coordination. - Outdoor activities or travel where quick impairment checks are helpful before using powered equipment or driving.