Accurate Detection: Builtin purification chamber uses advanced purification technology to remove impurities, delivering precise and reliable blood alcohol content readings for safer driving decisions. Visual System: Clear LED digital display with intuitive threecolor indicator lights provides immediate results and visual alcohol level cues that are easy to read in various lighting conditions. Voice Safety: Integrated intoxication alarm delivers audible voice reminders when alcohol concentrations exceed safe limits, offering prompt warnings to help you decide about driving readiness. Long Lasting Power: Rechargeable lithium battery enables extended use and multiple tests on a single charge, making this compact breathalyzer ideal for use while traveling or during evening outings. Use scenarios: After a social evening out, test before driving home to confirm you are within a safe limit. On a road trip, monitor your alcohol consumption to plan breaks or designate a driver. While traveling or staying in a hotel, use it to check readiness for early morning driving or flights.